FOSM

Accronym for Full On Stupid Mode
When it snows in Seattle, people drive in FOSM or "Full On Stupid Mode".
by donnabell November 23, 2010
Flag
Get the FOSM mug.

Fosm

1. fucking awesome
2. awesome in a sarcastic way
Willy K's blue plastic compass- raping whistle is fosm.
by Element 90 September 01, 2009
Flag
Get the Fosm mug.
More random definitions