Catch a friendly
To catch a friendly is to engage in a friendly physical dispute with someone. You might want to blow off some steam or expend some pent up frustration with a friend who has been bothering you, so you catch a friendly.
dude 1: "Bro you've been acting like a lil' punk lately. Somebody needs to put you in your place."
dude 2: "What, son?! You trnna' catch a friendly?!"
dude 1: "Damn right son, prepare yourself!"
dude 2: "What, son?! You trnna' catch a friendly?!"
dude 1: "Damn right son, prepare yourself!"