As a verb plappers
is (plapper).
As a noun slappers is
.
plappers
English
Verb
(head)
(plapper)
plapper
English
Verb
(
en verb)
to make a noise with the lips
:* 1922': She took no notice while he read by rote a solfa fable for her, '''plappering flatly — James Joyce, ''Ulysses