v. Simple past tense and past participle of lappet.
The Century Dictionary and Cyclopedia
In ornithology, wattled; having fleshy lappets at the base of the beak: as, the lappeted lapwing, Hoplopterus tectus or Sarciophorus pileatus.
Word Usage
"A black vulture rose up out of the depths on widespread pinions and floated past them almost within arm's length, turning its gruesome naked head of pink lappeted skin to stare at them with inscrutable black eyes before sailing away."