As verbs the difference between glump and flump
is that glump is (colloquial) to be sullen; to sulk while flump is to move or fall heavily, or with a dull sound.
As a noun flump is
the dull sound so produced.
flump
English
Verb
(
en verb)
to move or fall heavily, or with a dull sound
to drop something heavily or with a dull sound
Noun
(
en noun)
the dull sound so produced
Synonyms
* plunk, thud