Abbreviation for "Outta Sight, Outta Mind". Indicating that interest in someone or something disappears when that person/thing is not present.
What's up with him? Yesterday he was so into me. Today it's OSOM.
by 5th dentist June 11, 2009
bad way of spelling "awesome"
Oh man! These wheels are osom! Oh, i meant awesome!
by retsiwt January 28, 2009