A milky willy is when a lactating woman squirts breast milk into her husband's ear. Kinda like a wet willy, but with milk.
Dustin was sitting at the desk doing taxes. Suddenly, his wife snuck up behind him and squirted breast milk into his ear, giving him a milky willy.
by PDHB October 21, 2013
i have a milky willy
by the 5 footer November 3, 2019