When the light you're stopped at changes to green and you floor the
accelerator and take off at maximum
acceleration rate. Very fun. Term is really only applicable to
motorcycles and stick-shift manual cars. Commonly abbreviated as "WOT".
I filtered my way to the front of the light and went wide open throttle when the light
hit green. Went
0 to 60 in less than 3 seconds. Take that
cagers!
Going wide open throttle on a motorcycle is literally the funnest thing in the world.