Someone who plays ultimate frisbee.
Person 1: What's your favorite sport?
Person 2: Ultimate Frisbee.
Person 1: Oh, you're a disk sucker, that's so cool!
Person 2: Yeah, I love sucking disk.
The act of playing ultimate frisbee.
Person 1: You sucking disk tonight?
Person 2: Heck yeah dude, what time?
Person 1: 9:00 PM
Person 2: I'll be there.
Person 1: I love sucking disk.
Person 2: Me too bro.
Person 1: I wish I could suck disk all the time.
Person 2: Same