Swedish

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Etymology

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Perhaps from clipping of lycklig +‎ -o.

Noun

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lyllo n

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

Declension

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