half a crown 

£2.50 Two Pounds and Fifty pence in modern parlance. In 'old money' 2/6 two shillings and sixpence = twelve-and-a-half 'p', but with the rise of inflation, half a crown has more of a resonance with £2.50p

Hey Malcolm, can I have half a crown to cover your entry money for next year's Middlesex League?

half a crown by Jonathan FeBland June 27, 2008

sixpence half a crown 

Expression to describe what is occurring at your anus when in a state of extreme concern, panic, worry, or fright.

Derived from two British coins of a bygone era. The sixpence, small in size. The Half Crown, large in size.

British slang.

Bloody hell, Barry, when my main parachute failed to open I was going sixpence half a crown!

sixpence half a crown by kclunk January 16, 2021