That creaking, groaning, almost explosive movement of the stomach or bowels either due to a tense situation or pre-diarrhea stage due to something you ate or just having a shit filled situation.

Beegee - a hairy cunt.

As in the pop group, since they all are. Can be used both of the female genetalia or a person.

Bee-Gee is a name of a smart independent woman/girl also a very good looking person. The name Bee-Gee is very special because not many people have that name. And also Bee-Gee is a very cool person to chill with. 😎