Top Definition
(n.) derived from local Massachusetts phenomenon "Sweaty Jacky"

Refers to an attractive female, who under normal circumstances is quiet, friendly, intelligent, and charming; however, after consuming an exorbitant amount of alcohol, undergoes an "Incredible Hulk"-like metamorphosis. Symptoms commonly include sweatiness, greasiness, dead gaze, crossed eyes, hives, acne breakouts, invitations to hookup, bad breath, lack of understanding of personal bubbles, extreme urge to get others drunk, intermittent crying interspersed with dancing, and falling out of hammocks into pools.
Dude, I think I'm gonna try to hook up with Sarah tonight at the party.

No way, man! She's a total Sweatjack!
by TemperanceFan October 14, 2004

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