Much like the urban term spadoodle, that refers to the game in which you say spadoodle when you spot a vehicle with a headlight out, the term spadonkadonk can be used when you spot a vehicle with a tail light out.
Nah that's not a spadoodle, it's a tail light out. Therefore you say spadonkadonk.
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