The act of inserting your head into a woman's vagina in the case of extreme cold. This is beneficial for both parties, as you can give her a lick out during the duration of your stay. Also known as the "vagina pullover".
Bob: It's cold, can you give me a vagina skimask?
Jane: Okay, hop in!
The act of vomiting on someones back during intercourse.
Johnson had eaten ten pounds of taco meat and bananas before going to the bar. Upon beginning intercourse, he felt the need to vomit. "oh no, not the irish sunset", he thought, vomiting on his partner's back.