Often a person who is driving a vehicle, who INSISTS that you wear your seatbelt at ALL times. If you defy the seatbelt nazi, shit will hit the fan, word.
Andre "Dude, your Mom is a total seatbelt nazi!"

Rissa " I know, don't defy her, or she'll become SATAN! Word."
by MsRishah March 31, 2009
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A person who absolutely, positively refuses to start the car until everyone therein is buckled in, even if in a state where it's not required by law, and who will castrate her boyfriend if she sees him in any car unbuckled (This is to say 99.9% of all females.)
My girlfriend cut me off for a whole month because she caught me in an Uber without a seatbelt on. She was so angry I'm lucky I still have my both my testicles. What a seatbelt Nazi!
by enfant terrible April 3, 2021
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The seatbelt alarm thing in vehicles (especially older Toyotas (2015 sienna especially) that tries to control your life.
Oh no! The seatbelt Nazi is trying to control my life!
by Julerobb01 July 24, 2021
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