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1.
the written version of the induction sound created by a VTEC engine. The "boo" being the note before VTEC, and the baa, being the note after after VTEC the cam profile has changed.
I was driving along the highway when all of a sudden I hear boobAAAA!! and this Civic races past!
by johnnytwofingers August 10, 2003
 
2.
a sissy. an adult acting out like a child and looking rediculous
you look like such a boobaa fighting with that kid
by ajm April 04, 2003