Top Definition
Xi
One of many two and sometimes 3 letter words played at least 5 times a game in Words With Friends by some bastard with the effect of totally bollocksing up the placement of future tiles and sending your opponent into a dick punching rage
Fucking Dicker just busted out xi again and now theres 43 letters remaining and only room for 3 letter words.
by Bullyrammer October 25, 2013
3 more definitions
Xi
The greek letter that measures Spaeths

1Xi=1spaeth
cotthead is emmiting 50,000 Xi's of spaeth
by bobby reck June 11, 2006
Xi
38°54'47.72"N
1°26'20.58"E

Look cloSer.
Xi
by JessAFK April 30, 2009
Xi
Short for Christi/Christina in the same way Xmas is short for Christmas.
Hi Xi.
by RangaMate June 28, 2010

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