Top Definition
Abbreviation for 'Amazingly Shit Boring Update'.

Used mainly on social networking sites such as Facebook and Twitter when someone writes a status that is completely dull, boring, mundane and usually of absolutely no interest to anyone.

To give someone an ASBU is like an online version of an ASBO (Anti-Social Behaviour Order), except it's mainly used for boring shit.
Status: Mike Dullman has a cold.
Comment: ASBU.

Status: Sarah Drearyton is walking.
Comment: Wow. ASBU!

Status: Bob Shootmenow is eating chips.
Comment: For the love of God Bob... ASBU!
by CeinPierce July 19, 2011

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