A sexual act that involves of face fucking a girl so hard, you break her nose, and give her two black eyes. Her blackened eyes, swollen nose, bloodied mouth, and disheveled hair give her the appearance of a wolf (or lobo).
Howling after the deed is optional for either party.
I just loboed the shit out of that girl last night, Owwwoooooooh!
That son of a bitch loboed me and then just threw a towel in my face.