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an empty sack cannot stand upright

proverb One must eat in order to carry out one's duties. Have some dinner before you go back to your research. An empty sack cannot stand upright, you know.
See also: cannot, empty, sack, stand, upright

bolt upright

1. verb To suddenly sit or stand up from a reclining position. I bolted upright in bed when the phone rang in the middle of the night.
2. adjective Very erect in posture. The teacher instructed us to be bolt upright on the stage during the assembly.
See also: bolt, upright

dimber damber upright man

obsolete slang The leader of a band of thieves, miscreants, or gypsies. He walked through the town, this dimber damber upright man, quietly marking people as targets for his band of rogues who lurked in the shadows.
See also: man, upright

sit bolt upright

1. To have a very erect posture while sitting. The teacher demands that we all sit bolt upright during the lesson, scolding us should we begin to slouch. The seat of the train was so stiff that I ended up sitting bolt upright for nearly three hours.
2. To very suddenly or abruptly assume an erect posture while sitting. I awoke from the nightmare and sat bolt upright in my bed. We all sat bolt upright when the principal suddenly barged into class.
See also: bolt, sit, upright
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

An empty sack cannot stand upright.

Prov. A poor or hungry person cannot function properly. Sit down and have something to eat before you go back to work. An empty sack can't stand upright.
See also: cannot, empty, sack, stand, upright

sit bolt upright

to sit up straight. Tony sat bolt upright and listened to what the teacher was saying to him. After sitting bolt upright for almost an hour in that crowded airplane, I swore I would never fly again.
See also: bolt, sit, upright
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

bolt upright

Precisely perpendicular, erect in carriage, as in She sat bolt upright in her pew. This expression was used in slightly different form by Chaucer in the late 1300s: "She was ... long as a mast and upright as a bolt" ( The Miller's Tale).
See also: bolt, upright
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

bolt ˈupright

with your back very straight in an upright position: The noise woke her suddenly and she sat bolt upright in bed.
See also: bolt, upright
Farlex Partner Idioms Dictionary © Farlex 2017

bolt upright

In a rigidly vertical position: sat bolt upright.
See also: bolt, upright
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
Fit the cross beams to the uprights with metal brackets.
Since the uprights hold up the base, they have to be securely bolted to the base.
This floor care category, which has become somewhat antiquated due to relatively minimal investment in new technology, is starting to catch up to its upright peers, which have undergone a technological overhaul since Dyson stepped into the ring with $400 bagless cyclonic upright about four years ago.
However, where the required properties are lightness as a non-suspended mass, stiffness as any deformation compromises the kinetics of the suspension and braking, the downside of this process is that the uprights are heavier than they should be.
6 For stairs, if you pick an upright make sure it has a stretchy hose with a 3-4 metre reach.
The five he took were all R&Vs: a 2 hp horizontal, and a 2, 3 and two 4 hp uprights.
"The uprights are sensitive parts in the geometry of the suspension and have to be strong and stiff, yet very light," Zucchelli explains.
Start the string as described above by dropping a slip knot over the wing nut on one swingarm and then wrapping the desired number of strands around the swingarm uprights. This time, however, instead of taking the finishing end down between the strands and wrapping it around the wing nut, simply clip the starting strand just above the wing nut.
With only four pallets you can build a strong stand by placing two upright, one flat down and use the fourth for pieces of wood.
While the optical system employed in inverted microscopes is basically the same as that in uprights, a somewhat longer lightpath is required for comfortable viewing.
To mitigate the effect of forklift impacts against rear and front pallet racking uprights, the high visibility Pallet Rack Deflector accessory comes in two models: the AX115 for rear upright pallet rack columns, and the AX140 for front columns.
Fully welded uprights are roll formed in either four or six bend column profiles with 2-inch vertical adjustability.
"Wherever there is a lot of damage to uprights, it's usually occurring because the fork truck drivers are using the uprights as guides," says Kurt Larson, Central Regional Sales Manager for Steel King, Inc.
Then we'll show you how to mount them in simple grooved 1x2 uprights that you fasten to the walls.
The magazine, which surveyed 4,337 people with uprights and 3,299 with cylinders, said: "Dyson uprights clean as well as cylinders, but poor reliability prevents us recommending them." Sebo was voted most reliable upright, while Miele topped the cylinder category.