square peg(redirected from a square peg)
One who acts or thinks differently than most people. Typically used in the phrase "a square peg in a round hole." The young girl who had a love of math and science often felt like a square peg in a round hole when surrounded by her peers. When the man in the fancy suit walked into the biker bar, it was obvious that he was a square peg.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.