It is when you are just sitting around minding your own business and you have a little unexpected burp and a small amount af acidy puke comes up with it and you have to swallow the "hot snack".
"Dude, I was just talkin to my girl and out of no where I had to swallow a "hot snack" with out here noticing"
The act in which you blow a nasty "wet fart" into your partners mouth for sexual desire.
Useually after scarfing down at a mexican restraunt, and having the pre "taco shits".
dude i gave my girl a hot snack last night and she spit it back into my butt!