Scrawny Jack 

A person with very little muscle mass and overall lanky physique. Scrawny, thin

Go to the gym sometime, you're such a scrawny jack!

Scrawny Jack by ba21244 December 12, 2011

sky jack 

chara nari between souma kukai and daichi. a green and yellow theme. kukai is dressed as a pilot and has a skateboard that flies. his attack is golden victory shoot that uses a flaming soccer ball to take down his opponent. his powers are only gained from exposure to the humpty lock.

kukai: my own heart unlock. chara nari: sky jack!
daichi: wow. howd that happen?
kukai: amu?

sky jack by ayumu March 12, 2012

Rack & Jack 

When, upon lifting immense weight on bench press, one becomes incredibility turned on by their accomplishment. A "Rack-n-Jack" participant will then rack their weight and immediately begin masturbating in the gym.

Damn, I was pissed I couldn't get more reps last week at my new max. I was so impressed with myself that I rack & jacked it right there before I could finish my set.

Rack & Jack by asdfghkrd September 28, 2014

creepy jack 

A person who remembers the first day he wanked.

"It's creepy Jack!"

creepy jack by RoaringButtsex007 January 20, 2015

The Jack Russell

The act of vigorously shoving your dick into someone's bum,

"I'd give her The Jack Russell, lad"
or
"I'd be up the back of her like The Jack Russell"
or
"I heard John give Amie The Jack Russell, last Friday"

The Jack Russell by ZPL400 January 23, 2015

good jack

A person who at least appears to be nice enough to be compared to the late Jack Layton, a Canadian politician best known for his populist tendencies and familiar appeal to the general population, although arguably having a background of advocating "rational" policies. The kind of person you'd hang out with for a few good laughs, who has the well-being of people at heart.

Steve is a good jack, he's helping feeding the homeless.

good jack by Irish Republican Lady March 11, 2015

Honey Jack 

A girl who is strong but sweet

"Man that girl was a total Honey Jack, the perfect combination"

Honey Jack by marybelle101 September 27, 2015