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1.
1. One who's manhood dangles low i.e. a very large penis.
"Ladies you can call me Andrew "mandangalo" Phillips if you know what I mean."
by Andrew Phillips May 13, 2005
 
2.
1: A foolish or stupid person.
2: A person of profound mental retardation having a mental age below three years and generally being unable to learn connected speech or guard against common dangers. The term belongs to a classification system no longer in use and is now considered offensive.
"you're such an idiot!, why did you write 2+2=5 on the test?!?!?!"
by Stephen Otto April 24, 2005