Ok. Somebody has just played a card that really, really sucks. And you're sure they have about three of them!
Bring in the Sniper Card.
The sniper card is generally a single-use device that is practically a Useless Card except for its one objective. Usually that goal is to remove one specific card or narrow range of cards. It will do its job, and then get suckboxed.
The Sniper Card may just discard the cards, but it is more common and more useful to permanently remove cards from play (i.e. rip them up, set them on fire, etc.. Be creative.)