n. the penis, especially if erect. (Usually a nickname. Alludes to color.) : Now, put Barney away and let's talk about our relationship.
n. a nerd; a wimp; an unattractive male. (From the Flintstones character or the children's dinosaur character.) : If you weren't such a Barney, you'd stick up for your own rights.
n. a good-looking guy. : Man she's really found herself a Barney!
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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barney definition
In Commonwealth hackish, "barney" is to fred as bar is to foo. That is, people who commonly use "fred" as their first metasyntactic variable will often use "barney" second. The reference is, of course, to Fred Flintstone and Barney Rubble in the Flintstones cartoons. [Jargon File] (1994-11-28)