not the full quid
Rather stupid or unintelligent; slightly crazy or unhinged. Primarily heard in Australia, Canada. He's not the full quid if he thinks that plan is going to work. Of course he's not the full quid—he's wearing pajamas at the beach!
not the full quid
not very intelligent. Australian & New Zealand informal As an informal term for a pound sterling (or, in former times, a sovereign or guinea) quid dates from the late 17th century: its origins are unknown. Compare with not the full shilling (at shilling).
not the full ˈquid
(AustralE, New Zealand, informal) not very intelligent: George always looks to me like he’s not the full quid. OPPOSITE: all thereA quid is an informal word for one pound in British money.