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1.
Someone that is skinny so they have a 6 pack. But dont work out for it just naturally, not anorexic, just skinny. Usually have no other muscle mass either.
He's so skinny i can see a 6 pack on that guy, but look he has no muscle. Thats what u call a skinny pack.
de Joe3645 2 mai 2006
 
2.
A Skinnypack is when a skinny male is so conceited and skinny that they think they actually have a six pack when really there is just so little skin the abdominal muscles are more visible.
Douchebag: YO! check my six pack bro!

Regular Guy: idiot, your to skinny! you have a Skinnypack!
de balls33445 30 mars 2011
 
3.
“The skinny pack,” is a phrase the website Purelifts.com invented for those guys who go out all the time with their shirts off thinking they have a 6 pack. I’m talking about the guys who are about 6’2 and weigh 120lbs if they are LUCKY.
Guy: Damn, why do girls fancy that guy in Twilight so much? He's just a rat with a skinny pack.
de Leviasean 17 avril 2013
 
4.
A skinny pack is when a person's body has barely any body mass and abdominals show.
A: Hey! Look at my six pack!

B: Dude.. That's a skinny pack..
de Pseudonuymm 25 janvier 2011