Definition of lanker:
(adj) :
Slender or thin; not well filled out; not plump; shrunken; lean.
(adj) :
(of hair) Straight and flat; thin and limp. (Often associated with being greasy.)
(adj) :
(obsolete) Meagre, paltry, scant in quantity.
(adj) :
(obsolete) Languid; drooping, slack.
(v) :
(rare, intransitive) To become lank.
(n) :
A surname.