Shnife

To shnife, or shnifing or shnifed:

The act of hitting something face first and sliding on it, with your face.

He was so drunk he made an attempt down the stairs but shnifed the wall the whole way down.

Or another example:

I don't think I could pull off (insert physically demanding action here), my balance is so bad I'd probably shnife that hard and I have an interview tomorrow