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1.
offensive.

A person who repeatedly loses ju jitsu/ judo fights by doing stupid things. (often used as a general term of abuse).
person A: i cant believe i gave him a straight arm again!

person B: i know your such a Gi-Tard. *Armbars person A*
by 11 62 61 32 51 January 18, 2012
 
2.
A giant retard. An increasingly common word in The Yukon and Calgary (Canada), as well as in Malta.
"You are such a fucking gi-tard."
by mick zed August 16, 2005