Something that someone does that only someone considered a 'dick' would do.
Bro #1: I was walking down the street with my mom yesterday and this dick came and shot her in the face.
Bro #2: What a dick thing to do.
Bro #1: IFKR!
When you're doing anal and you notice you have a little shit on your dick and rather than get a towel, you just wipe it off on a cheek and sick back in like the beast you are underneath.
"Man last night me and shelly were doin butt stuff and i noticed i had shit on my dick, so i did that dick wiping thing and stuck it back in dry."
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).