Swedish edit

Etymology edit

Perhaps from clipping of lycklig +‎ -o.

Noun edit

lyllo n

  1. (slang) a lucky or fortunate person
    Ditt lyllo!You lucky guy!

Declension edit

Declension of lyllo 
Singular Plural
Indefinite Definite Indefinite Definite
Nominative lyllo lyllot lyllon lyllona
Genitive lyllos lyllots lyllons lyllonas