In my native town of Hrughurd, we play a similar game that, translated, means “New Truth or Snow-Ass”. You have to either tell the group something about yourself that none of them know about you or you have to run outside, pull your pants down, and slide on the snow such that snow thoroughly goes in your bu@#crack. Some people would not even bother with trying to come up with an embarrassing and obscure fact about themselves, and just run straight outside when their turn came, ass into the wind.
It was a great game, especially if you were a fan of naked red asses. But there’s an additional rule: You can lie. But someone else can challenge you and accuse you of lying. If they’re right, you admit it and go outside for your snow-ass. If they’re wrong about their accusation, then they have to go outside for a real heavy-duty snow-ass.
Anyway, to answer the question, the farthest I’ve gone is with snow fully up my asscrack. Just a freezing cold rim job that was. I was a bad liar then. I’m slightly better at lying now.