not the full quid
not the full quidnot 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 there
A quid is an informal word for one pound in British money.