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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
Jeffing by weeeeeeeeaver April 10, 2010
Related Words
(Verb) A 'portmanteau' consisting of the words Jacket and Huffing.

The act of sniffing an individual's scent off an article of clothing that said individual discarded or left behind accidentally. Typically committed towards a person who is known to have a distinct or pleasant smell. Used in a negative connotation, as it is often done in secret - albeit harmless. The enthusiasm and force of the inhalation usually increases with the creepiness of the one practicing the behavior.

Not to be confused with the homosexual act.
Jacob left his zip-up sweater behind after the party. After noticing he had forgotten it I was innocently Juffing it, wondering if he wears some sort of cologne.
Juffing by Gohound October 10, 2012
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.
Jeffing by PotPie1121 August 7, 2020

Face jeffing

When one decides to royally ruin another's face with their penis
Hey little lady how's about a face jeffing
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
Jeffing by Nickjp2 December 4, 2014
To ejaculate onto a Mc Vitties Jaffa Cake, and then possibly give it to your sister so she can experience that salty pleasure
1. "Josh just Jaffed on that JaffaCake, he offered it to his sister." (He had cum all over the now soggy Jaffa)" 2."She loved the sight of him jaffing furiously last night"
Jaffing by Old Sweaty Man 69 May 10, 2016