GROSS!

"Cement mixer
From Wikipedia, the free encyclopedia
This article is about the alcoholic drink. For the device, see concrete mixer.
A cement mixer is a shot drink. It consists of:
1 part Bailey's Irish Cream
1 part Lime juice (lemon juice may be substituted)
The drink is traditionally ingested by taking the shot of Bailey's, holding it in the mouth, then sipping the lime juice and swirling the two around the mouth. The drink may also be combined as a layered shot, as the lime juice is less dense than most brands of "Irish Cream". The acidic lime juice causes the cream-based Bailey's to curdle. The curdled Bailey's does not taste sour, but it does rapidly gain viscosity and stick to your teeth, reminiscent of cement."