(verb, adjective, noun) To act in a retarded way and be overly proud of it...
At a family supper, he stood up and semiGabed by leaving abruptly and shouting "fuck youuuuuu!!" for no apparent reason.
by Bhoriss Viahn March 4, 2018
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That semigab cheated on me. We're over!
by speech teach October 10, 2019
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