1 definition by PenguinHemmo

Top Definition
A person who has a sudden love for the band 5 Seconds Of Summer after hearing their "first" song She Looks So Perfect.

Pronounced 5-es-oh-es.
Girl1: OMFG I JUST LISTENED TO 5 ES OH ES NEW SONG SHE LOOKS SO PERFECT! IM THEIR #1 FAN 5SOSER FOR LIFE!

Me: Shut up.
by PenguinHemmo May 06, 2014

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