sweat jacket 

A zip-up sweatshirt or hooded zip-up sweatshirt. Otherwise known as a 'zip-up sweatshirt'. Comhmonly used term in Long Island, New York, though Steph is the only person we've EVER heard use the term.

No Steph, noone uses the term sweat jacket, other than you!

sweat jacket by Steph/Kap May 13, 2006

sweat jacket 

A ridiculously unneeded term for a zip up sweatshirt, basically a hoodie to everyone on earth except 5 people who use the word sweat jacket.

Quiz:
What color is your favorite hoodie?
Maria: I dont own one!
Hayley: Yes you do, it is blue, you wear it almost everyday.
Maria: No, thats a sweat jacket, what are you talking about?
Hayley: NO, WHAT ARE YOU TALKING ABOUT???

sweat jacket by HayleyH November 10, 2007

Seat Jacker

Someone who takes your spot of the couch when you leave for less then a minute as if hes waiting for his opportunity to strike

Joe is a seat jacker so watch your shit.

Seat Jacker by RKALLDAY September 23, 2012