Similar to the sexual term, it generally means to have somebody in a favorable position, like after beating the shit out of them, and ramming any object of your choice into one of their main orifices, like their mouth or anus.

However, many people don't know how to taste with their anus, so you might as well just say it in a foreign language, like:

smak tęczy, BITCH
OR
die smaak van die reënboog, BITCH

A swimmer