Defeat by Modesty: In both versions of the film, Audrey II thwarts Seymour's attempt to axe it by pantsing him, prompting Seymour to drop the axe and duck behind a counter.
Karma Houdini: Seymour killed two people (he let Orin die despite making it clear that he could have helped him and he backed Mushnik into the plant) and considered going even further (he signed the contracts in "The Meek Shall Inherit", implicitly agreeing to kill others in the future. This is made clearer in the play where the song is extended, but the actions remain the same in the film.) but in the theatrical cut, he gets away with absolutely no punishment whatsoever-Audrey likely never even learns that he is a murderer.
It can be argued that Seymour finally standing up to and destroying the plant thus preventing the destruction of the human race pretty much makes up for the world being less one sadistic dentist (which WASN'T his fault, despite intentions to the contrary) and one greedy, albeit somewhat kind, shopkeep (which may not have been entirely on purpose whatever the plant said). Both deaths are made a lot more ambiguous in the film than the play, and can be interpreted as due to Seymour's actions or not.
The Director's Cut makes it pretty clear that he didn't get away with anything, even if you don't count his death. Orin and Mushnik died only because Seymour doesn't prevent their deaths, and they both would have harmed him (Orin with dental sadism, Mushnik through blackmail) even if he had saved them. Audrey, on the other hand, he consciously fed to the plant, even if it was at her own selfless request. If he hadn't done it, Audrey II might not have been strong enough to tear down the building and eat Seymour whole.
Enfante Terrible/Creepy Child: "When I was young and just a bad little kid, my Momma noticed funny things like shooting puppies with a BB gun, I'd poison guppies and when I was done, I'd find a pussy cat and bash it's head, that's when my Momma said..."