stuff happened

A discreet way of referring to various sexual acts, often used by women. It certainly refers to more than a quick kiss, but can denote anything from a cloths-on make-out session to full-blown intercourse. The lack of explicit detail is intentional on the part of the user of the phrase.

A phrase used by all to justify various kinds of strange occurrences. Used when the phrase "shit happens" isn't quite appropriate.