From the ebonics word "booyar" literally meaning "Yes my negro friend, what excellent circumstance!" and the pirate word "yar" literally meaning "YAR!" we have come upon booyar, which means, everything is awesomely awesome.
Jamal: "So I capped his ass, and I broke out.
Slippery Pete: "BOOYAR!"
In the act of doing it doggy-style, the person on all fours looks back over the shoulder to see the other party, causing an effect similar to the look your guppy would give you from the comfort of their bowl.