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
1 more definition
bad way of spelling "awesome"
Oh man! These wheels are osom! Oh, i meant awesome!
by retsiwt January 28, 2009