"The act of creating deliberately confusing jargon and user-interfaces which trick your users into sharing more info about themselves than they really want to. Usually associated with e-marketers and e-spammers." -Tom Jones
A Zuckerpunch is an "evil" interface is meant to trick users into doing things they don't want to. Greg Conti's examples include aggressive pop-up ads, malware that masquerades as anti-virus software, and pre-checked checkboxes for unwanted "special offers".
ref. Facebook's "Evil Interfaces." Tim Jones. April 29, 2010. Electronic Frontier Foundation - Deep Links (blog). Retrieved from: www.eff.org/deeplinks/2010/04/facebooks-evil-interfaces on May 1, 2010.
When a person you thought you could trust, in matters either personal or professional, has royally dicked you over for their own personal gain.
Turns out the status updates that were originally only accessible to my friends are now visible to anyone on the internet, just so Facebook could rip off what Twitter does. Talk about a double-Zuckerpunch!