Top Definition
Unfortunately Still Sleeps In Mother's Basement... a term used to describe people that argue over Star Wars themes, any form of inner galatic battle, or just total loser fucks that can't get any and sleep in their mother's house way into their late 20s and 30s.
Jim watches Star Wars in his mom's house all day.. what a fucking USSIMB
by JP Scrotum July 19, 2006
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