As adjectives the difference between saggier and waggier
is that saggier is (saggy) while waggier is (waggy).
saggier
English
Adjective
(head)
(saggy)
saggy
English
Adjective
(er)
Baggy or loose-fitting.
That sinks or droops from wear or its own weight.
waggier
English
Adjective
(head)
(waggy) waggy
English
Adjective
(er)
having a tendency to wag
Synonyms
*waggily