Soggy biscuit is a male group masturbation activity in which the participants stand around a biscuit or cookie masturbating and ejaculating onto it; the last person to do so must eat the biscuit. Wikipedia

Sex game Wikidata

A supposed game where men masturbate each other in a circle, ejaculating onto a biscuit (or cookie or other food), with the last person to ejaculate forced to eat the biscuit; it is associated mainly with all-male hazing in environments like boarding schools and military training. Wiktionary