Dropped the Towel

Originating in California for an awesome, often sudden, happening, often a climax. Terminology comes from common sexting images where the subject teases with a loosely arranged drying cloth before they 'drop the towel'.

1.An offer of a private bargain, especially a request for sexual relations.

Origins: this girl who had liked this guy asked if she could use his shower, only to come out of the shower, drop her towel and "request sexual relations".