Colloquially spelled roc is the acronym for Reducing Risk of Cancer, popularized as an alternative euphemism for masturbation. It is based on several scientific studies, including one published in 2004 in the Journal of the American Medical Association that point to the benefits of regular ejaculation to reduce the risk of certain types of cancer.
Tim: Did you see how hot she looked last night.
James: Hell yeah! I was like roc roc.
Nancy: I think the new guy might have caught me staring at him.
Betty: OMG, I know he’s like totally rocing material
Jim: Bro, what where you doing in there. Were you fapping dude.
Adam: I don’t fap, I rroc dude.
Jim: Nasty dude!
Adam: Just kidding, I was texting Sarah.