As adjectives the difference between gloppy and gloopy
is that gloppy is soft and soggy; mushy while gloopy is having a glutinous, sloppy consistency; gloppy.
gloppy
English
Adjective
(er)
soft and soggy; mushy. gloopy
English
Adjective
(er)
(informal) Having a glutinous, sloppy consistency; gloppy