Exhibiting a lack of wisdom or good sense; foolish.
Nikki is very xilly.
by Big T February 27, 2005
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a xilli is one who sucks penis continually, only pausing to suck his own penis
he blows like a xilli
by tRiXxX May 06, 2005
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Xilli is a 1337 Kunt who drives a Tough Line, also known as a living legend or totally phatt.
My god he is a xilli
by Xilli October 25, 2004
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