I. ˈlün noun
( -s )
Etymology: Middle English loun
1. : a worthless person : idler , lout , rascal
2. chiefly Scotland
a. : a man of low station : menial
b. : mistress , harlot
c. : boy , lad
the family … consisted of three loons and a lassie — S.R.Crockett
3.
a. : a crazy person
b. : simpleton
II. noun
( -s )
Etymology: of Scandinavian origin; akin to Norwegian lom loon, Old Norse lōmr — more at lament
1. : any of several fish-eating diving birds that belong to the genus Gavia and the order Gaviiformes and that are found in the northern part of the northern hemisphere
2. : grebe 1