Acronym for "Multiple Shots on Goal." When a prostitute allows multiple ejaculations for one fee
"I think that whore really loved me. She allowed MSOG"
by Ramon Santiago July 09, 2003
When a woman allows a man to ejaculate multiple times during one sexual encounter. Not necessarily in the same location each time
JoAnna allowed MSOG last night.
by GR8 M8 February 21, 2008