noun, adj. or verb. From an acronym for "hint of slut". The badly-executed tatt job, the cheap belly piercing, or smudged mascara that can turn an otherwise unremarkable female into an object of unwilling lust.
My wife caught me boning the Polish cleaner and kicked me out - I never even fancied her but she hossed me out with a flash of her market-stall panties as she unloaded the washing.
That's pure h.o.s., mate.