An "orangutang bang" is polyamorous sexual activity undertaken by a individual caucasian female and a troupe consisting of three or more negro males.
So from my room I heard someone say, "Put that big thing in my mouth". I then walked to the kitchen where I found my roommate and several of his friends along with a redhead from the swimming team ensconced. In general terms they were engaged in what could be described as a gangbang. I was invited to join however, I turned down the invitation. Later my friends termed what was occur to be not a "gangbang", but an "orangutang bang".
When a gentleman decides he would rather have sex with a bread product than the fat chick he has been set up with, and thus swoops from a vine in order to gank the bagel that Fatty McNochance is about to eat, and proceeds to have his way with it.
This is the verb form of the word orangutan. This is when a woman is on her knees with her arms bent at a 90 degree angle with her forearms facing forward with a dick in each hand. She then proceeds to go back and forth between the two dicks aggressively blowing them while jerking the opposite dick off. She never spends more than 4 or 5 seconds with her mouth on one dick before switching back the the other dick. Most importantly in the second or two it takes her to switch her mouth from one meat stick to the other she yells like an excited ape (ahhh ahhh ahhhhhhh).
Yo dude, I was hanging out with my boy the other day at his house and this young chick from next door came over and started boozing it up with us. Next thing we know she orangutan'd us! Dude she just dropped to her knees and started aping out on our dicks.