A) a curved berry (yes berry retard, because it doesn't have seeds) considered to be fruit that can be sliced up or eaten whole.
B) a penis or dildo slang term
Banana, A subscriber of Onision who watches his videos so obsessively they begin to peel their own skin off while cannibalising themselves to the point of death.
Most bananas, aka Onision subscribers wind up dead or in the hospital due to the cancerous effect of his videos. Onision must be stopped.