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1.
A person who is unusually scruffy, disheveled, disorganized, and clumsy. Can also be used as a term of endearment.
My friend is such a mal doon, he always wears his bobble hats lopsided and never arrives on time.

I love you mal doon
by Faye Wyatt February 27, 2008

Words related to mal doon

disheveled disorganized honey scruffy sweet heart
 
2.
SGTS in the military who think they know it all, or are funny, but in actuality are only compensating for their own " short comings"
E-5 - E-7 mainly males are maldoons, rarely females, but some have known to be
by specialist/e-4 May 14, 2010