Alright kids, a jack nasty is where a boy usually high school or younger who can't get laid masturbates 'jacks off' into some tissues. Since he is often not one to properly discpose of them, they drift about the room and eventually make their residence beneath his bed.
The resulting hard, crusty tissue wad peeking out from beneath the mattress... Is a jack nasty.
The resulting hard, crusty tissue wad peeking out from beneath the mattress... Is a jack nasty.
Person A: What's with the tissues, dude?
Person B: Nothing!
Person A: Man you was makin' jack nasties!
OR:
Man that chick was so fine but I'll never get with her. I cry alone at night and make jack nasties.
Person B: Nothing!
Person A: Man you was makin' jack nasties!
OR:
Man that chick was so fine but I'll never get with her. I cry alone at night and make jack nasties.
by Alexander C.R September 8, 2005

The UMP45 found in Call of Duty Modern Warfare 2. It is commonly used by the GTLM clan to completely destroy all other teams in ANY game type.
by Ultranasty850 October 28, 2010

by Hickey25 September 19, 2008

This is a sexual move that can be practiced in a variety of ways It’s where you give your partner a dead arm then stick your penis their armpit crease alternatively you masturbate with a dead arm but in the elbow crease for a more sensual experience you may offer this up as an alternate of the ‘handjob’ to give you partner pleasure
by Joliver smodfith August 23, 2021

positioning yourself up high or elevated level above some body, pulling down your pants and underpants, and taking a huge dump all over an unsuspecting victim.
by uberdonuts February 19, 2011

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"
by Chill asf September 17, 2017

by bizboy February 3, 2010
