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2 definitions by changsta

another form of sex;hard, hardcore sex;good sex that people enjoy
Emily wants whoopie with ellie!
by changsta November 30, 2005
1. Modus Operandi (method of operation), how you do something

2. Multiple Orgasm
1. The killers MO was drowning his victims

2. "I gave Krista the best sex of her life last night. She totally Mo'd."
by Changsta December 19, 2005