A Puddle Fuck is the act of a person (man woman or other) fucking a woman until she has squirted that much that she is lying in a puddle; hence puddle fuck
Babe I want to puddlefuck you...
He screwed me so much last night, it was a total puddle fuck.
Person 1: Check out that puddle, she wants to do me tonight for a puff sac.
Person 2: She'll sleep with anyone won't she?
Person 1: That's why she's a puddle, it takes a lot of drips to make a puddle.