J-Nasty 

When a co-worker gives you a name that you absolutely hate. Then other co-workers join in on the fun until it gets posted on Urban Dictionary.

Hey J-Nasty, can I borrow the key to go get nuggets?

J-Nasty by McSpiceDrop July 7, 2011

J Nasty 

Something you call a girl who’s name is juliette and who’s knees are nasty af

Bob: “oh shit look at her knees“
Karen: “Ew, what a j nasty”

J Nasty by Daniel Kerig March 15, 2020

nasty j 

The notion of skipping the oral part of a blowjob and going towards the anus instead,it shows that you care for your partner if you do it right after they use the bathroom in the toilet that you both know you haven't cleaned in the past week

"hey babe you just want to go for that nasty j today? My (genital) isn't doing so well today and can you please not use your teeth this time"

nasty j by Chill asf September 17, 2017

Jnasty

Is a disgusting thing that doesn't know the meaning of cleanliness and upkeep; believes that field day, is the only day that week he has to keep the room clean.

Cpl.= Damn it Jnasty (Johnson) there is a pancake stuck to the glass plate in the microwave.

Jnasty= wasn't me!

Jnasty by Sleeping Sheep October 16, 2008