1) the only term that appropriately refers to the one and only, Gary Busey.
2) an expression used in situations such as imagining Gary Busey in the nude, or admiring the utter insanity of Gary Busey.
3) an interjection used in the unfortunate case when Gary Busey pulls the endocrine system out of your body.
Everyone: Hello buseyboo♥
Person A: Did you see that video of Gary Busey in a straight jacket?
Person B: Yeahh man! I saw it and I just said "buseyboo!"
Gary Busey: **pulls endocrine system out of your body**