Green’s Dictionary of Slang

toup n.

[abbr. SE toupee]

a wig.

[UK]P. Bull I know the Face viii 138: ‘Say, Padre, is that a toup?’ he naïvely enquires [OED].
[US]J. Wambaugh Golden Orange (1991) 78: The tall guy with the funny red toup on his head.