not the full shilling

not the full shilling

BRITISH, INFORMAL
If you say that someone is not the full shilling, you mean that they are stupid or crazy. We all thought he wasn't quite the full shilling because he was slow — slow at sums and slow at writing.
See also: full, not, shilling

not the full shilling

not mentally alert or quick-thinking.
See also: full, not, shilling