Where a guy tells his woman that she can give him a snowball kiss after he cums in her mouth, but instead he covers her mouth and punches her in the stomach to make her swallow, and then runs away.
Jenny is so mad, she wanted to snowball me, but I gave her a snowball's chance in hell instead.
"That's a great idea to solve the political crisis in Mali. It seems adapted to the context, and is based on discussions with people. But, we are the United Nations, so good ideas have a snowball's chance in hell of surviving."
An entity that will survive longer if attacked than if left alone. Reference to Tolstoy's comment in War and Peace that a snowball will stick together as it melts on a stove when it would fall apart if left alone. Lesser known cousin of Chekov's Gun.
Bro #1: Bro, do you want to prank our rival team before the big game?
Bro #2: Nah bro, did you hear them arguing after that last practice? They're Tolstoy's Snowball - they'll play way worse if they don't have us to focus on.
when a girl gives you a blowjob and acts like she swallowed, but didnt. and then she kisses you, to share a mouth full of semen that you didnt expect. hence the *surprise*