The act of placing one’s erect nipple into another person’s anus; the act of giving a ‘Milkdud.’
Tina: Me and Jennifer got drunk last night, and she gave me Milkdud.
Billy: Like…the candy?
Tina: No no no. A Milkdud…you know.
Billy: OH NO A CLiiiiifff….OH NOOoo…
Tina: That’s the last time I ever try Milkdudding…