When you are at a family or friendly gathering and you are in the worst mood ever. You don't want to be rude, but if you say anything it will certainly be rude. Use this word to convey to your significant other that it's time to go.
Mike: Hey baby, are you enjoying the party?
Nikki: I'm going to slit your throat if you ask me one more question... effing snickers
Mike: Snickers? We just got here...
Nikki: ::callus nod:: snickers