Green’s Dictionary of Slang

deafy n.

also deafey

1. a deaf person.

[UK]L.I. Guiney Letters 193: They are fine seats for a ‘deafy’ like me.

2. (US Und.) a deaf beggar (or one who poses as such).

[US]‘Boxcar Bertha’ Sister of the Road (1975) 301: Beggars [...] may be further sub-divided into groups: a. Blinkey (blind) b. Deafey (deaf) [etc.].