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Related to pancake: buttermilk pancake, pancake batter
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(as) flat as a pancake

1. Physically squashed or flattened. I forgot that I had a muffin in my bag, and it's flat as a pancake now. My model of a volcano is as flat as a pancake now that you've sat on it!
2. euphemism, rude Having very small breasts. Don't worry if it takes a little longer than usual for yout chest to develop. I was flat as a board until I was nearly 16!
See also: flat, pancake

be (as) flat as a pancake

slang To be physically squashed or flattened. I forgot that I had a muffin in my bag, and it's flat as a pancake now. My model of a volcano is as flat as a pancake now that you've sat on it!
See also: flat, pancake
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

*flat as a board

 and *flat as a pancake
Cliché very flat. (Also used to describe someone's chest or abdomen, referring to well-developed abdominal muscles or small or nearly absent breasts or pectoral muscles-in either sex. *Also: as ~.) Jane was flat as a board until she was sixteen, when she suddenly blossomed. Lucy can mash an aluminum can flat as a pancake with one blow from her heel.
See also: board, flat
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

flat as a pancake

Extremely level, especially too much so. For example, There are no hills; this terrain is flat as a pancake. This simile dates from the 1500s and has survived its contemporary, flat as a flounder. It is sometimes used, either disparagingly or ruefully, to describe a small-breasted woman.
See also: flat, pancake
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.

flat as a pancake

If something is as flat as a pancake, it is very flat. There was barely a breeze and the water was as flat as a pancake. Could he really put up interest rates now? With the economy flat as a pancake and the housing market in crisis?
See also: flat, pancake
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

flat as a pancake

completely flat.
See also: flat, pancake
Farlex Partner Idioms Dictionary © Farlex 2017

(as) flat as a ˈpancake

(informal) completely flat: There are one or two hills in Norfolk, but otherwise the landscape is as flat as a pancake.
See also: flat, pancake
Farlex Partner Idioms Dictionary © Farlex 2017

flat as a pancake

Exceedingly flat, sometimes excessively so. This simile has been around since the sixteenth century, appearing in Nicholas Udall’s translation of Erasmus (1542) and Henry Porter’s play The Two Angrie Women of Abington (1599, 2.3). Morever, it survived and replaced the equally old flat as a flounder and is still frequently used today, often in deprecating fashion to describe a woman’s lack of mammary endowment.
See also: flat, pancake
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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References in periodicals archive ?
If making Shrove Tuesday pancakes has you in a dither, take a tip from 2009 Masterchef Mat Follas, owner of Dorset's The Wild Garlic restaurant.
Seeing the red velvet pancakes made me curious of whether they would taste like a red velvet cake, which I love.
Cook for a minute on one side until golden brown and flip the pancake to cook the other side .
Buttermilk is often used in pancakes and some people like a mix of milk and water.
Gear up towards the end of the week on Thursday with two of Pancake House's crispy and succulent Classic Pan Chicken.
We were of course fairly full at thi t b t hit this stage but who can resist a sweet French pancake for afters?
A short stack of three pancakes usually costs around $5.79, but on March 12 guests can enjoy the popular meal free.
Asda Linwood's general store manager, Daniel McCabe, said: "It's fantastic to see Linwood as Scotland as well as the U.K.'s pancake capital.
According UK, the Tuesday from the Christians their sins and thus "shriven" A bell would be rung to call them to confession, which was called the "pancake bell".
With Pancake Day fast approaching, Asda have pulled out all the stops to wow both kids and adults in the kitchen with their themed frying pans.
In theproduct descriptionon its website, Asda said: "This funny decorative pancake pan combines advanced features with an exclusive decor.
INGREDIENTS (SERVES 4) Pancake batter: 50g plain flour; 3 tablespoons coconut flour; 1 teaspoon baking powder; pinch of salt; 150ml milk; 3 eggs, beaten; 4 tablespoons runny honey; 1 teaspoon vanilla extract; 5 tablespoons mixed seeds, such as linseeds, chia seeds, sunflower seeds, poppy seeds two tablespoons coconut oil.