Fear of Getting It
Is there such a phobia? A fear of somehow outing yourself as a geek, nerd, or dweeb simply by getting a joke?
Also, I realize the whole "i'm in ur ___ doing somethin' to your ___" meme is old, but damnit, cats are funny. (They have to be, or I'd strangle mine.)
That said, this combines both of those sentences in one, hilarious image.
By the by, if you'd like to see almost every one of those cats pictures (and then some), go here.