nasty breath 

"Nice" nickname for someone whose teeth are so rotted that even if they rinsed their mouth out with acid it wouldn't make a difference.

I don't care how many breath mints you pop during sex, I still wouldn't touch you with a ten foot pole, nasty breath!

nasty breath by Gollum May 28, 2006

Nasty breath 

Breath that smells like either stale poo, garlic, snot or anything else offensive to the notstrils.

Go chew on mint leaves, your nasty breath is stanky

Nasty breath by PEPPATHEPIG May 10, 2016