What is Butt Bush?
1.
The patch of hair at the base of the spine, just above the start of the butt crack. Usually found on men. Resembles a traditional bush, just located on the opposite side.
Ex) That guy's pants were hanging so low, I saw his butt bush.
Ex) He's so hairy...he needs to wax his butt bush!
See 
2.
When the butt crack hair is more abundant than the hair on ones genitals..
" Man...that nigga-bitch in the low riderr jeans- bent over, and her butt bush fell outa her pants...
See 
Random Words:
1. 
1. Transformer way of cursing towards ill events
2. Super computer in Transformer universe
1. "yo dude, that guy stole your bike!..