It's the biggest question Daytona 500 champ Jimmie Johnson -- and every other NASCAR driver -- faces during a grueling 3-4 hour race ... HOW DO YOU GO TO THE BATHROOM??? And JJ actually gave us an answer.
Jimmie -- who was out in NYC yesterday -- told TMZ, "Some guys just go." Yes, in their pants.
But the 5-time Sprint Cup champ adamantly denied ever wetting himself, adding ... "I never have. Of course I wouldn't do that."
SURE YOU WOULDN'T.
As for whether Jimmie ever gets carsick -- the answer is yes, but you'll be shocked to hear how and when he goes green ... in the face.
Do You or Do You Not ...
PEE IN YOUR RACE CAR?
2/27/2013 12:50 AM PST BY TMZ STAFF
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