A phrase used to ridicule someone's stupidity, "big white mint" refers to a urinal cake. Thus "don't eat the big white mint" implies that someone is stupid enough to mistake the urinal cake for a mint and eat it.
I was on a date with this really dumbass guy, and he said he had to go to the bathroom. I said, OK, don't eat the big white mint.
This means the same thing as, "Beat it," or, "Get the hell outta here," or, "Yeah, the door is this way, pal."
When Wayne's job interview was going poorly and he had a fight with the interviewer, the interviewer kindly asked him to leave by saying, "Yeah, Don't let the door hit you on the ass, buddy."
An expression used to present your assumption that a person will be giving a blow job. Originates from the movie Good Will Hunting
You know, I was on this plane once, and I’m sittin there, and the captain gets on and does his whole you know “we’ll be cruising at 35,000 feet,” but then he put puts the mic down and forgets to turn it off. And he turns to the co-pilot and he’s like “you know, all I could use right now is a fuckin’ blow job and a cup of coffee.” So the stewardess goes fuckin’ bombing up from the back of the plane to tell him that his microphone’s still on and this guy in the back of the plane’s like “hey hun, don't forget the coffee”