A bro licking another bro's butthole so that the anal hairs twist around his tongue, just like spaghetti twists around a fork. For added pleasure, you can use the shit as spaghetti sauce.
Bro 1: Hey bro you going out with Kelsi tonight?
Bro 2: No, dawg I don't have any plans.
Bro 1: Do you wanna take part in some spaghetti twirling?
Bro 2: Is that even a question? I love twirling your spaghetti. I'll get my bib.