1. A sexual procedure similar to the screaming seagull. In order to perform "the yeti," one must be doing a girl in the snow, and subsequently take a handful of snow, put it on her ham wallet
, and pack it in with one's pork steeple
. The audible result sounds like the call of the yeti.
2. The snowy bigfoot guy.
I was doing this chick on the ski slopes at Vail and I decided to give her the yeti. She groaned, and sounded like a yeti, which attracted a REAL YETI. It was frigging huge, and had horns and shit, so I had to ski away with my junk out.