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A condition that induces a severe lack of activity. Poor self motivation.

Made famous by the Madchester group Happy Mondays, on their "Bummed" EP.
It's 3pm and Charlie is still in bed, he's got lazyitis!

You haven't done the washing up properly, there's still gravy on this crockery! Why can't you do the washing up properly- have you got lazyitis again?
by Ancharlavy February 28, 2005
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