adj. To have semen all over your hand(s) from either yourself, or a boyfriend after coming. Usually results from unexpected climax.
Lady: My boyfriend didn't warn me before he came, so he gave me a serious case of snowman hand.
Dude: The picture of Angelina Jolie on the cover of Marie Claire made me nut so fast I gave myself snowman hand.
Other Dude: You read Marie Claire?