Bowling

When someone is laying down on their stomach, and one goes behind the person laying down and acts like the persons ass is a bowling ball and you stick your middle finger in their ass

Hey man i'm about to go bowling on your bitch ass

Meat Builds

Another way of saying " Beat my Meat" or " Masturbate" without anyone knowing the true definition, you can say it anywhere

i'm about to hit the meat builds be right back guys

or

i just hit the meat builds and it felt good!