As adjectives the difference between faggiest and jaggiest
is that faggiest is (faggy) while jaggiest is (jaggy).
faggiest
English
Adjective
(head)
(faggy) faggy
English
Adjective
(er)
(pejorative, informal) Effeminate; homosexual; gay
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jaggiest
English
Adjective
(head)
(jaggy)
jaggy
English
Adjective
(er)
jagged, toothed or serrated