An excuse for doing something rashly. Usually used in a very childish manner and for actions that aren't really that big of a deal. Often used with the shocker hand signal.
See YOLO.
Sarah: OMG, I can't believe we just did that thing we just did! #noregrets
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi