Boni Mitchell Share definition Flag Noun: The common and tantalizing erection a man obtains while listening to the female folk artist, Joni Mitchell. Based on the music coming from Alex’s room, he’s probably got a major Boni Mitchell. Boni Mitchell by Lil Funyun June 13, 2018 0 0 Get merch Get the Boni Mitchell mug. Buy Now — $32.95 See more merch