For use when:
a) Girlfriend dumps you for cheating with her cat. (wait... WTF?)
b) Caught stealing (free) unattended samples at the supermarket.
c) When you drink toilet water soup, made by your 4-year old.
... or whenever you get fucked (at school, while driving, on the mattress, etc.)
God, he is such a fum.
"Just won the lottery man, I've got F.U.M.!"