who is jack? 

borat creates this humerous moment. merely a cathphrase consisting of 3 words, "who is jack?" can be said in a various amount of situations, all equally as humerous.

1.*man with car jack* And this is the car jack
*borat/you*yes... and when will jack get here?

2.*man with bowling jack* you must roll the jack.
*borat/you* ah ok, so who is jack?

3.*man with jack* hello, meet jack.
*borat/you* lik the jack nicholson? "i hold up the bank"

who is jack? by derrty_harry April 14, 2005

slacker jack 

a lazy, unemployable rapper. One who is rubbish at MC-ing.

Shucks!! that Morris cannot even get a job in Mcdonalds, he is rubbish at MC-ing and can not rap. What a slacker jack!

slacker jack by jonnyradfar December 6, 2006

muddy jack hammer

when a woman puts a vibrator in her ass while being boned

I was having realations with this chick and she used a muddy jack hammer.

muddy jack hammer by j squared from mad town April 10, 2009

Tribute Jack

To jack off onto someones picture.

I'm gonna give Megan Fox a real tribute jack or 2 tonight. I just picked up her Maxim spread.

Tribute Jack by ganjanamo1979 February 1, 2010

Dirty Jack 

A homosexual man (typically named Jack) who shits on the ground and proceeds to have homosexual intercourse with a homeless transsexual on their period and docks there clit dick with his urethra using his shit as lube and proceeding to cum in his own mouth with the shit and period covering his man breasts.

"What the fuck is that obese man doing to that hopeless citizen"
"Oh that must be Dirty Jack fucking homeless Ben"

Dirty Jack by Xx_BonZer_Xx97 October 18, 2021

sipping on Jack 

To lick one's asshole

I was sipping on Jack all night long and now my mouth tastes like your mom's ass.

sipping on Jack by Jackrim June 16, 2011

Peanut Butter Slip Jack 

The act of having your girl lick a generous helping of peanut butter off your junk, leaving behind a tacky lubricant. You then slam your dick into the first available hole and jackhammer it like an old sidewalk.

She walked funny for days after I gave her the Peanut Butter Slip Jack.

Peanut Butter Slip Jack by The Cum Factory June 28, 2011