(informal) A dangling modifier, especially a dangling participle.
(slang) A penis.
(in-plural, slang) The testicles.
A plotline that is metaphorically left to "dangle" or "hang"; in other words, the plotline is forgotten, phased out and eventually dropped, and thus a resolution is never achieved.
(informal) A large earring that hangs down far.
(archaic) One who dangles about (loiters around) others, especially a man chasing after women.