The act of several people excreting in a enemy or rival's toilet.The (multiple) excretions are continuous and are,at no point until completely finished, to be flushed. Instead, 'layers' are only separated by toilet paper. The end result - which,incidentally, can be expanded by 'icing' or 'finishing touches'- should resemble a (multi)layer cake.
The act of trying to hit on someone standing adjacent to you while in a public restroom.
Derived from the definition of caking: the act of flirting.
A pun referring to the the Urinal Cake within the urinal of a male restroom.
"Did you hear that Joe totally picked up some other guy in the bathroom."
"Yup. They were urinal caking for about 2 minutes before they started making out."