Old Harry n.
1. [mid-17C+] (also Lord Harry, old Henry) the Devil.
2. [late 17C–early 19C] a form of unspecified adulterant used in wine.
[mid-19C; 1970s] to a great (lit. ‘devilish’) extent.
[19C–1900s] to ‘play the Devil’ (with), to make mischief, to tease or scold.
see raise Ned under Ned n.