Spilkshake

When a Tom Mcgregor ejaculates into a milkshake. Their sperm is now in the milkshake, therefor creating a spilkshake.

guy 1: did you taste that weird milkshake?
guy 2: mate! that was a spilkshake!
guy 1: OMG! that is disgusting

Spilkshake by jjjaaayyy June 10, 2014

Smilkshake 

A blended mixture of smegma and milk. Similar to the consistency of a milkshake (hench the name).

In the fraternity's new hazing tradition, recruits were forced to drink smilkshakes from the vaginas of nasty old women.

Smilkshake by matt e. m. August 28, 2005

Stiltshake

This is a bespoke milkshake - one reserved only for those of society's highest ranks. A soothing blend of Derby's most gruesome, gone-off phlegmy cheese combined with the children's toenails found in Sneinton's grimiest orphanages.

"Waag, did you try a dollop of that new stilton milkshake from CookieShake?"
"Yeah man, that Stiltshake tastes gruesome"

Stiltshake by dollopgoblin August 24, 2019