if one's a day

if (one's) a day

One is at least a particular age (which is typically specified right before this phrase is said). Stu's been with the company for almost 30 years, so I bet he's 50 if he's a day. A: "No, she's 24 if she's a day. She looks like a college student!" B: "I know, but she's really 38, I swear." How does he keep himself looking so young—he's got to be 60 if he's a day!

See also: if

Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.

if one’s a day

phr. a phrase attached to an expression of someone’s age. I’m sure he’s forty-five if he’s a day.

See also: if

McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.