a. A rounded tree, very artistic and mystical to some cultures and regions. Very commonly used in anal stimulation during cult ceremonies.
b. A faggit who likes take cock up the pooper. Preferably black cock up the pooper. If its not big, veiny and dripping with cum a roundtree doesn't want anything to do with it.
I want to go to the ceremony this weekend and take a roundtree.
Man that bitch Sam is a real roundtree. I saw him last night popping E then getting tripple-teamed by some black cock.