When adults have mental issues, whether diagnosed, or gone undiagnosed, that lead them to act out erratically, or not like a logical, pragmatic individual.
Example: "they aren't playing with a full deck."

Damien: I ain’t going after nobody! They are fully grown adults. If they choose to go out that door, mad, or whatever, so be it.

Jimmie: Well, they may be fully grown adults, but…

Felicity: (Cutting her father, Jimmie, off). But they aren’t playing with a full deck.
by Danny Boss June 12, 2022
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thunk deck

It is usually mentioned for someone with a big dick.. When a person has a boner, and when the dick gets very big its called thunk deck
i love your thunk deck . i want to bj
by blumblee September 16, 2015
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decked

another word for punching someone or breaking their nose with your fists
Oh my god did you see Jonah decked Marcus in the face yesterday!
by hellokittygrungebby2277 May 17, 2021
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Wet Poop Deck

When a girl poops on your penis and then she proceeds to suck it clean off, leaving the penis soaking with saliva and her mouth full of shit
Bro me and my girl tried out “Wet Poop Decklast night, it was crazy.
by AnalDirtStache October 02, 2019
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decked

to fall on the ground humourously
my mate decked it at the club last night, they were so drunk
by kfj;k4fj4 November 16, 2021
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Powerwash My Deck

Him: Powerwash my deck with your mouth
Her: *gug gug gug*
by Powerwashing April 15, 2019
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