another form of sex;hard, hardcore sex;good sex that people enjoy
Emily wants whoopie with ellie!
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."
© 1999-2015 Urban Dictionary ®
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