busy as a beaver
(as) busy as a beaver (building a new dam)
Very busy, assiduous, or hardworking. The phrase refers to beavers' reputation for being extremely industrious. Between working two part-time jobs, volunteering on the weekends, and looking after his little brother, Sam's been busy as a beaver this summer. I've been as busy as a beaver building a new dam this year. I've had almost no free time!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
*busy as a beaver (building a new dam)and *busy as a bee; *busy as a one-armed paperhanger; *busy as Grand Central Station; *busy as a cat on a hot tin roof; *busy as a fish peddler in Lent; *busy as a cranberry merchant (at Thanksgiving); *busy as popcorn on a skillet
very busy. (*Also: as ~.) My boss keeps me as busy as a one-armed paperhanger. I don't have time to talk to you. I'm as busy as a beaver. When the tourist season starts, this store is busy as Grand Central Station. Sorry I can't go to lunch with you. I'm as busy as a beaver building a new dam. Prying into other folks' business kept him busy as popcorn on a skillet.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
busy as a beaver
Also, busy as a bee. Hardworking, very industrious, as in With all her activities, Sue is always busy as a bee, or Bob's busy as a beaver trying to finish painting before it rains. The comparison to beavers dates from the late 1700s, the variant from the late 1300s. Also see eager beaver; work like a beaver.
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.