1) Sexual foreplay in which the anus is stimulated by the tongue and lips.
2) Sexual foreplay in which the vagina of a hobo is stimulated by the tongue and lips.
1) Matilda was surprised when Charlie started performing bumilingus on the dance floor.
2) "I performed bumilingus on that tramp 'cause I didn't have any spare change."
the act of using your newly shaved head to "give head" to a woman, rubbing the fuzz up and down on her vagina like a deer rubbing its antlers against a tree.