As you're cumming at the end of sex, you down a whole jug of chocolate milk. Similar to the term blumpkin.
"I bought some chocolate milk today so me and my girlfriend can try a milky finish."
The act of drinking chocolate milk while having an orgasm.
I've tried the milky finish yesterday, it was awesome!
Just fucking down an entire jug of chocolate milk while cumming inside of your partner. Similar to a blumpkin but not as gross.
Sean: My milky-finish was ruined last night after I bought a jug of fat free chocolate milk.
Tobey (Maguire): Pizza Time