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 3, 2010
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A southern slang verb for shooting the shit. This involves joking around, teasing, or just talking to another person.
Mother: Why were you just sitting in front of the house in Jimmy's car for so long?
Son: Not much we were just jeffing.
by PotPie1121 August 7, 2020
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Jeffing is the act of interrupting peoples activities in a rude way.
*Jack and Nick are playing volleyball.

As Jack serves the ball to Nick, Jeff comes in and spikes the ball to the ground. He proceeds to walk away without saying a word. Jeffing
by Nickjp2 December 5, 2014
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When Jeff cums on someone rather than in them.
He was caught in the act of jeffing on her face
by dildoswaggins41 November 7, 2018
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Doing something that is out of the realm of normal human stupidity. See also retarded
"So I'm doing this Polish chick, right. All of a sudden I get this notion that slamming a vase over her head would be sweet. Ya know, like a donkey punch, except with a vase. Long story short, she filed a lawsuit against me for "assault" and "battery." I didn't hit her with a battery. It was a vase! Stupid court."
-"Dude, you were jeffing then, and you are jeffing now. Get away from me."
by Chief O'Chiefs March 12, 2009
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To describe what someone did or said as stupid
Tom is totally jeffing.
Adolf completely jeffed.
by icon626 November 17, 2009
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