An incredibly informal use of the terms such as : "incredibly good"/"well-liked"/"good".
Usually the word would be
used in situations where two or more people
communicate to each other how they view their opinions on (a) certain intaty('s), usually noun/opinion/adjective, and even more usually used on forms of food.
The word originates in slang culture in North America, most likely having its roots in the word "busting", implying that the word originates from after one would
masturbate/ejactulate, after the sexual climax one would just had been finished "busting"; henceforth evolving in slag culture being used so commonly as a form of (in simplest terms) "good". Therefore, the word itself would grow into a New-England North
American accent, evolving into the word "bussin"
(The word could also be used in a double conjoined sentence, where one's object/view would be *so* well liked, one would use the term "Bussin' Bussin'" to emphasize major forms of pleasure)