As verbs the difference between glump and grump
is that glump is to be sullen; to sulk while grump is to complain.
As a noun grump is
a habitually grumpy or complaining person.
grump
English
Noun
(
en noun)
a habitually grumpy or complaining person
First used in print by Daniel Defoe in 1727.
Verb
(
en verb)
to complain
to be grumpy