when your mouth produces large amounts of saliva before you vomit.
‘I’m seriously going to spew Bertha, pull over the car, I’m getting mouth sweats’
AKA: wet mouth
mouth sweats: define #2
n. Excessive drooling, usually induced by delightful cooking aromas, physiological excitation, or Pavlovian chimes. Sometimes a precursor to forceful vomiting.
I can feel the mouth sweat coming! Somebody fetch me a bucket!