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.
See: bagel burn and dirty bagelin'
Gary wasn't about to settle for chub, so he proceeded to execute the infamous "Orangutang BagelBang" with lightning speed and incredulous precision.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.