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Abbreviation for silly duffer brother.

SDB can be used as a noun or adjective to describe an extremely idiotic person (also a nitwit or fool) or an extremely idiotic action.

SDB combines Aussie slang (silly duffer) and incorporates a reference to the world renowned Duffer Brothers (American twin brothers who write and direct science fiction films, horror films and television shows - including Stranger Things).
Board member 1: "The Chairman isn't wearing any pants!"

Board member 2: "He's such an SDB!"
by Horatio Bumbus July 26, 2017
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Sucks Donkey Balls (usually used in online discussions), indicating the topic under consideration is really, really horrible.
Oh man, that playaz' web forum SDB
by Blorf May 31, 2005
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Super
Duper
Buddies

out beats crappy gf/bf stereo types
out beats best friends
the best thing some one could have

being with someone very spesuhl and great to them everyday
hobo and looser is an example of sdbs
becuz they started it

so dont steal it
by KHH March 06, 2005
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1. Stupid Dumb Bitch (noun) 2. Describing either a male or female.
Zander: "Ugh, I can't stand her!!!"

Gio: "Who?! Why?!"

Zander: "My math teacher Ms. Hester! This Bitch ask me the question, 'Zander where's your homework assignment from last night and the night before last?'. I respond, 'Ms. Hester, I didn't, the class didn't, you didn't assign homework over the last 2 nights ' 'Yes, yes I did. I am the teacher and you are the student! So again I ask, where is your homework before I fail you!' 'So you gonna fail me cause your ass didn't assign homework over the weekend end, that ain't right!' 'I'll see you in the principal's office today after school with your parents and homework or I'll have you suspended!' 'So you gonna suspended for being a SDB?' 'SDB?! What's that?' 'For a teacher your not very smart, you Stupid Dumb Bitch!' Class, 'Oooooooooh'. 'Get out of my classroom! To the President's office!!!' 'There you go again! It's the Principal's office SDB!!!' Class, 'hahahahahahahaha'
by Zander Nelson January 29, 2014
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SDB means synd det Blommeh. It's a Norwegian saying of friend zoned. Or a creep that don't take no for an answer
by Catliver_billy September 22, 2016
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