a guy who wears those big round glasses, a bow tie, and suspenders. he has seen Star Trek at least 24 times. His real name is like Gariel or something. he looks a lot like Flanders.
Ugh, what the hell Gary!
Gary - adjective
A Gary is a person who is different or oppositional. Garys will usually do the exact opposite of whatever is popular currently, or whatever everyone else around him is doing. They usually do this to attract attention in most situations.
"He was the only dude who didn't show up to the party, he's such a gary."
A local Oceanside child molester/cunt
Did you hear that Sarah got abducted by Gary dimenstien?
A man who has sex with a woman then hangs out with her child
Made popular from the Netflix show 'Big Mouth'
Steve: I was really looking forward to being your Gary
Jay: What's a Gary?
Steve: Having sex with your mom then hanging out with you