A Kansas City term for "faking" or being fake in general.
" Yo George stop jeffing with Ben, you was just talking bad about this dude a few days ago."
by Gmoney289 January 15, 2018
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The act of taking an egg, with draw on face with square glasses on a night out. Often involving taking photos of said egg in unusual scenes.
I went Jeffing last night! He got smashed!
by Kyle454 December 24, 2012
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The act of losing your shit at given moment for things some may find very insignificant. Resulting in your entire day being ruined and most likely breaking anything you can get your hands on.
Why is there a hole in the wall? Jeff was Jeffing over not being able to beat free cell in under 2 minutes.
by Jbarrer December 07, 2016
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It is being shut-out in foosball. You fail to score a score
We lost by a jeffing in Foosball.
by TheJeff February 25, 2015
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The act of reiterating exactly the same thing your friend literally just said, causing a cloud of annoyance and awkwardness amongst the group.
Colin: "Guys, I just ordered 5000 condoms online."
Wyatt: "Oh, I was just about to say, I ordered 5000 condoms online too!"
-_-
Colin: "Wyatt, quit Jeffing me."
Dylan: "Yeah, you're such a Jeff!"
by HeyJeff April 08, 2015
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1. The act of secretly jerking off on video chat in the bathroom while your wife is in the other room.

2. Using childish insults like fat, ugly, and poor when you don't know how to use logic to defend your point of view.
1. Girl 1: Who is that guy?

Girl 2: Just some loser who is always jeffing me on snapchat.

2. You know you've already lost the argument when you start Jeffing.
by Kasilyn13 October 23, 2018
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To ask someone out and not mean it.
Aidan was jeffing Emily by asking her out and broke up with her two seconds later
by weeeeeeeeaver April 02, 2010
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