ETYMOLOGY
from light (adj.) + –mans (suffix forming nouns from adjectives and nouns in 16th century and early 17th century cant)
EXAMPLE
“…Bene lyghtmans to thy quarromes in what lipkē hast thou lipped in this darkemanes; whether in a lybbege or in the strummell? …”
(God morrowe to thy bodye, in what house hast thou lyne in all night whether in a bed, or in the strawe?)
From: A Caueat for commen Cvrsetors vulgarely called Uagabones
By Thomas Harmon, 1567
Lexicophilia 