This occurs when you touch all four of your fingers against your thumb, then stick finger-formation in your anal; gathering feces on all fingers. Once collected on fingers, flick on recipient's face in a bogey-flicking like manner. This causes the effect of flying scattered bullets.
Brandon: Mason was talking a lot of shit the other day, so I prepared an arsenal of monkey bullets. When he was wondering what I was doing, I quickly fired Monkey Bullets in his face and said ''Have your shit back!''
by Hayden Trudgill March 24, 2008