Used for MSN Messenger to effectively stop someone from talking to you. Block them so you appear offline to them, and delete them so they don't waste space on your list.
Person 1: lol
Person 1: lol
Person 1: lol
Person 2: STFU or i'll block delete you
by Hom3r September 15, 2005
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When you are so fiercely aggravated by invites to stupid fucking groups or profiles, you want to follow the simple pattern of blocking someone so you receive no more invites, deleting them so you never have to see them online again and finally, killing them so they cease to burden you with their dirty existence any longer.

Can also relate to spammers on messaging clients.
#1

Kel: Damnit man, that cunt is spamming me with stupid Facebook group links!
Tom: BDK her NOW!
Kel: BDK?
Tom: Block Delete Kill.

#2

Idiot Girl: hi hw r u mi bowser bar is liek VANISHED OMG wher did it go can u find it 4 me pls x x
Jack: GOD FUCKING DAMNIT I'MMA BDK YO ASS SO HARD BITCH
by MisterMushroom March 1, 2010
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