A number of frends were discussing how MILF (mom i'd like to f*ck) is
now too
popular to use in a crowded place, as the MILF in question would probably understand what you were saying. These same individuals were taken to saying MILF YSSUP (which is to say MILF PUS*Y).
FILM was substituted instead of MILF, and
STRIP was added for obvious effect (and because it sounds like YSSUP).