This phrase can be used as a verb or a noun, depending on context.
Verb: Sex
on the floor, cunnilingus
on the floor, DOIN' THE NASTY
on the floor. You get the gist.
Noun 1: Vagina
Noun 2: A literal pie that has been placed on the floor in Project Zomboid (original but lame definition)
"Yo bros, I'll brb. Gotta eat some floor pie. The girl is getting restless."
"Oh daddy you eat my floor pie so good!"
"Why did you place that pie
on the floor? Do you expect me to eat this?" "Yes, it's floor pie. What else are you
supposed to do with it?".
"The ladies love Jim because he's great at eating some floor pie, if
you know what I'm sayin'."