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1) (verb) To remove all traces of a user's account or a (sub)forum. Unlike the shadowban, the unwary user knows when he's banned because his account is locked and all his posts are gone as if he was never there.

1) What happens to innocent users and forum threads when micro-dicked mods or admins exercise their power of the banhammer.
That asshole shadowbanned me on his site, so I hammerbaned his ass here.
by Maschinenmensch November 05, 2015
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