Dirty Jef 

To have unprotected sex whilst knowing that you have an STD and not telling your partner

Cletus: dude, i dirty jef'd this bird last night
Friend: oh yeh? you should really wear a helmet next time
Cletus: nah fuck it, bitch be itching for dayz

Dirty Jef by nuttaaa August 26, 2018

Dirty Jeff 

Lying on one's back while a female sits on your face. Oral sex is then performed on her. The key is to be a black belt in tongue fu. Her secretions then become heavier and heavier until they fill your lungs causing asphyxiation

After a long night of the Dirty Jeff, I am having problems breathing, but my girlfriend is very happy.

Dirty Jeff by Connielingus April 22, 2007

Dirty jeff 

A badass marine who's dick casted shadows over North Dakota

I thought it was a solar eclipse tonight, but no it must be dirty jeff in Wyoming.

Dirty jeff by Goosera1 April 15, 2020

Dirty Jeffrey 

oral sex (giving head, deep throating) a dildo or vibrator

She gave a dirty jeffrey before inserting that fat dildo in her vagina.

Dirty Jeffrey by flowinon August 14, 2010

Dirty Jefferson

The act of giving or receiving a rim job that occurs anytime after the recipient has taken a shit and not showered afterwards.
Named after NBA player Richard Jefferson, as he shares the same initials as Rim Job.

"Hey I received a Dirty Jefferson off this chick last night"

"Damn, that's nasty!"

Dirty Jefferson by Dong Megatron January 4, 2014

Dirty Jeffrey 

Taking a dildoe and covering it in a sticky substance not used for lubricant and used for uncomfortable anal pleasure

She asked if she wanted to watch her do a dirty Jeffrey i feel bad for her ass now

Dirty Jeffrey by BungerBowing July 6, 2021

dirty jeffers 

Having a massive dick

Mark has a dirty jeffers

dirty jeffers by I am well hung September 6, 2021