Green’s Dictionary of Slang

maund n.

[maund v.]
(UK Und.)

1. [17C] begging; thus a specific begging ruse, e.g. a fake sore.

2. [early 18C] a beggar.

In phrases

soldier’s maund (n.) (also soldier’s mawnd)

[17C–18C] (UK Und.) a fake wound, assumed by beggars who wish to pose as soldiers returned from the wars; thus the beggar who uses this ruse.