E.f. Or F.f?
"C'mon, let's go to bed."
"
e.f. or
f.f?"
"both."
Alleged to be old Navy slang, meaning, "You wanna get some real food or some tail first?" Occurs in _Time Enough for Love_ by Robert Heinlein. When Dora, "The Adopted Daughter," propositions him, Lazarus asks her "
E.F. or
F.F.?" She answers, "Both," which is in character for her and also has multiple meanings.