Top Definition
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!
by Steph/Kap May 03, 2006
1 more definition
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???
by HayleyH October 24, 2007

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