Simple combination of Butt, and anus. Cute
way of saying "your an
asshole", but to a loved one like a
bf or gf.
Gf: "
Honey did you remember that it's my
birthday today?" Bf : "oh what? really?" Gf: "how could you forget?" Bf: "im joking
baby," *pulls out flowers* Gf: "your such a bnanus"