A variation on the rickroll. Someone posts a bogus link that is purported to be for something interesting, funny, or hot, like lesbians making out. The unsuspecting victim clicks the link, only to see a picture of a penis and/or naked man. Usually the victim is a straight guy, and this of course is not something he wants to see.
Similar in nature to the rickroll, dickrolling (or to dickroll someone) is when you send someone a link to chatroulette, knowing they've never been there before, only to assume the first video served up will be a nice, close shot of some dick.
"Dude, have you seen that website, chatroulette? There's so much dick on it!"
"Yes, Susan, in fact I have. My mom sent me a link to it without telling me what it was and the first thing I saw was a dick!"
A variation on the rickroll. Placing a link on a web page that purports to link to interesting content but is in fact a link to a video of Dick Cheney.
Some guy on reddit posted a link in a comment that was supposed to be a lolcat, but it was really a dickroll! Boring!