This word was invented by English comedian Sacha Baron Cohen for his character Ali G in "Da Ali G Show". Since Sacha is Israeli, he pulled from the Hebrew language and urban slang to create Booyakasha. First, the very popular Hebrew phrase "Sheket B’Vakasha!" which means "Please be quiet!". Second, the slang term booya, which is a cry of victory to embarrass the defeated party (see also in your face). Booyakasha was supposed to sound Jamaican or African. It means in context "Be quiet because I am right and you are wrong! I win! Feel embarrassed about it!"
by Inman SQ Girl May 01, 2007
booyakasha is a word that can be used in any situation, at any time, when no other response can be thought of. similar to 'your mum;' if you don't know what to say, simply shout BOOYAKASHA! it ends all arguments. you disagree? BOOYAKASHA! (can also be shortened to 'boo-ya')
by bridgino June 25, 2007
eg. in an exciting situation 'booyakasha westside' ! representing the west side of town or the western suburbs.
by ballulah tutcher July 11, 2008
if one were to do something extraordinary to make someone else look bad, he would exclaim booyakasha
by Farris F. Fanik February 25, 2007
by bla-ness June 14, 2007
by Josh12345 September 06, 2006
by Lallaaaaaaaaanah October 17, 2006