Top Definition
made famous by the flight of the conchord's song 'mother uckers'; it is the beeped out version of 'fucker'.
too many mother uckers uckin with my shi-
#mother #fuckers #flight #of #the #conchords
by jemaine+bret July 05, 2009
A "tool", "choad" or "lil' sack". Can be used to address a friend as well as someone in which you despise. Can also be used in somewhat polite company as a synonym for "fucker".
Friend: "Hey ucker, whatcha doing for lunch today?"

Despise: "Oh crap, here comes that stupid ucker again with his little whore of a girlfriend."
by Mammy November 02, 2003
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