Not the full quid

phrase

Not very bright, or a bit mad.

Person 1"He put the milk in the cupboard."

Person 2"He's not the full quid."

You'll also hear

A few sandwiches short of a picnicsame

Where it's from

A quid was a pound before decimal currency arrived in 1966.

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While you're here

Face like a chewed Mintie
Crumpled and sour-looking.
He'd root a snake's mouth if someone held it open
He will have sex with anyone or anything.
I hope your ears turn into arseholes and shit on your shoulders
A curse on someone you are very angry with.
Not enough brains to give himself a headache
Very stupid.
Useful as tits on a bull
Completely useless.
A stubbie short of a six-pack
Not very bright, or a bit mad.

Random one for ya