tapper

punching someone in the balls

but it's a noun, not a verb

Rich gave Tim a tapper at the lunch table and he got really pissed off

holy cleavage

an exclaimation said when you suddenly out of the blue see a large amount of cleavage. derived from saying holy cow or holy shit when you see something that shocks or surprises you.

girl 1: hey wanna see a picture of me in my prom dress?
girl 2: sure *gets pic* holy cleavage!
girl 1: yeah sorry about that...but do you like the color?

CSI

Crazy Space Incest. Term commonly used in fanfiction.
Refers to a romantic/sexual relationship between the characters Simon and River Tam on the show Firefly.
Many viewers of the show felt that there was a romantic, if not sexual, subtext between Simon and River thoughout the series, thus the term CSI, crazy space incest, erupted.

Person 1: I read a Firefly fic yesterday and it had some CSI parts in it. Do you want me to send you the link?
Person 2: Yeah, cool. I love CSI fics.

Light It ~ The CSI Shipper's Community on Livejournal
http ://community.livejournal.com/light_it