The gargling of jizz immediately following a blowjob over the blowee's dick in a bubbly, spitty manner accompanied by a forceful neigh. (Picture a blower with a mouthful of dick and freshly erupted jizz imitatingprecisely the sound of an excited horse.)
Dude, my girl cum humphreyed me so loud last night that the neighbors phoned local authorities. I had jizz spattered all over my Tommy Hilfigers.