Noun. A subsequent indulgence in an activity by a second person involving an exchange of bodily fluids. This may involve the sharing of drink, or more often it applies to a sexual nature. E.g."I'm not having sloppy seconds, I want to shag her first."
SLOPPY SECONDS
Meaning of SLOPPY SECONDS in English
Slang English vocab. Английский сленговый словарь. 2012