Top definition
A phrase used to caution someone before undertaking any difficult task.
I will help you carry that couch.

ok thanks, but dont blow a foofer valve.

can apply to most situations.
by hmorrison February 19, 2011
Get the mug
Get a foofer valve mug for your Facebook friend Vivek.
A highly technical description of an electrical part that is unknown
Techo 1: Hey, why isn't that working?
Techo 2: Not sure, I think it's blown a Foofer Valve
by mikeybear69 July 02, 2009
Get the mug
Get a Foofer valve mug for your daughter Sarah.