It is a combination of the term “boot gang” meaning to take or steal and “Gucci” the designer fashion line. This term is used to describe when you take something nice or in a “slick” fashion.
"Bucci Culo"-swamp ass hybrid that occures when you dont wipe your buttgood enough. Then go and work up a sweat, causing poo particles to mix with sweat. resulting in a rank smell that speads into your clothing.