FLSS

When someone's just being a bit of a fat lazy slag. Can be used to describe how someone is acting.

FLSS = Fat lazy slag syndrome

God, is it me or is Sharon suffering from FLSS?

by sachishagger July 15, 2019

FLSS

A school in Queensland Forest Lake which is FLSHS but for juniors prep-year 6

(Super cool dude) Hey have you ever heard of FLSS?
(Curious George) What's FLSS?
(Super cool dude again) A school

ninja

by afljafjlafjlafjlaflafjlaf December 14, 2025