Nasty yoghurt abbreviated to NY is teenage slang to convey disgust or something irkesome and convey a general sense of annoyance.
He is such a liar NY (nasty yoghurt)
The art of ejaculating into ones nostrils, then slurping it out...
Person1: Yo that girl is so cool, she let me nose yoghurt her
Person2: Bro that is gross
1. Jizz; semen.
2. The jizz filled sample of yoghurt mixed by Mr. A. Garcia in New Mexico and given to a shopper in a grocery store on January 25, 2011, making both Mr. Garcia and the yoghurt sample temporarily famous on The Smoking Gun, etc.
Woman: "Damn, this recipe calls for a tablespoon of plain yoghurt and we ran out yesterday."
Man: "Can you use Mexican yoghurt?"