1. The plural form of the word platypus;
A semiaquatic egg-laying mammal that frequents lakes and streams in eastern Australia. It has a sensitive pliable bill shaped like that of a duck, webbed feet with venomous spurs, and dense fur.

2. Frequently used term to describe a group of "bitches".
CAITLIN: I don't hang out with those girls anymore, they were bitches.
NATHAN: Fo' REALZ, what a posse o' platypussies!
by caitlin Perry February 24, 2007
A vagina, with a loose, floppy labia that hangs down like the bill of a Duck-Billed-Platypus.

However, it should be noted that unlike the bill of the Duck-Billed-Platypus, most "platypussys" or "platypussi" for the grammatical sticklers amongst us, do NOT have electoreceptors along the lateral ridge.
-"How was it?"
-"Good until she took her underwear off, total platypussy."
-"Did you find the electroreceptors?"
-"I don't think it had those."
by The Vagina Defina... February 02, 2010
A platypussy is a vagina that is so incredibly tight that the penetrator literally needs to use a shoe-horn to shove his cock inside of it. Following release and withdrawal, the shoe-horn is left extruding from the cunt, resembling a hairy mammal with a duck-like beak (i.e., a platypus).
Herbert: My dear Walter, why are you having such difficulty donning your shoes?

Walter: Because I left my shoehorn inside a woman's vaginal opening last night after I shoved my chode in there.

Herbert: I dare say, it must have been a platypussy!

(Scene)
by Joey the Grip 2 June 03, 2010
1. The plural form of the word platypus;
A semiaquatic egg-laying mammal that frequents lakes and streams in eastern Australia. It has a sensitive pliable bill shaped like that of a duck, webbed feet with venomous spurs, and dense fur.

2. Frequently used term to describe a group of "bitches".
CAITLIN: I don't hang out with those girls anymore, they were bitches.
NATHAN: Fo' REALZ, what a posse o' platypussies!
by caitlin Perry June 11, 2008
1. The plural form of the word platypus;
A semiaquatic egg-laying mammal that frequents lakes and streams in eastern Australia. It has a sensitive pliable bill shaped like that of a duck, webbed feet with venomous spurs, and dense fur.

2. Frequently used term to describe a group of "bitches".
CAITLIN: I don't hang out with those girls anymore, they were bitches.
NATHAN: Fo' REALZ, what a posse o' platypussies!
by caitlin Perry February 16, 2007
1. The plural form of the word platypus;
A semiaquatic egg-laying mammal that frequents lakes and streams in eastern Australia. It has a sensitive pliable bill shaped like that of a duck, webbed feet with venomous spurs, and dense fur.

2. Frequently used term to describe a group of "bitches".
CAITLIN: I don't hang out with those girls anymore, they were bitches.
NATHAN: Fo' REALZ, what a posse o' platypussies!
by caitlin Perry February 21, 2007
A platypus sized vag
See epilatypussy
Wow man her's is so big!

Big enough to be a platypussy?

HELL YEAH!
by Nasugi November 23, 2011

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