Mangy means having mange or being diseased but there is a girl who has this disease who has a secret Instagram account named after the infamous mangy with an added nose. She posts funny things and her friends and of course of her fish flops too ;) She is not afraid to post anything so don't let her catch a bad photo of you or it will end up on mangy for sure.
Heidi: Um wow, what's that Instagram account?
Ady: Uh...duh that's mangy nose!