Jimmie Johnson
Do You or Do You Not ...
PEE IN YOUR RACE CAR?
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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.