1. (noun or verb) a flacid penis, generally long in length, that is difficult to erect. Shaking the penis in attempts to get hard result in a "dead puppet" type motion hence the term floppy sock. Also known as "flop sock".

See Aaron Hands.
Noun - I wanted to bone that bitch but all that Jack I drank gave me a floppy sock.

Verb - I couldn't get it up so I floppy-socked that bitch in the face for a while until I gave up and smoked a blunt.
by King Blumpkin of SoCal March 5, 2004
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When the full end of a condom hangs off your dick
I pulled out and slapped her in the thigh with the floppy sock
by WhiskeyKarma October 4, 2018
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