adj; for a woman to be promiscuous/shameless.
v; to engage in sex with a promiscuous female.
adj; "I hooked-up with this girl last night whom had the sloshiest box evar!"
v; "I totally sloshed that box!"
Someone who is more of an alcoholic than someone who is called Lushbag. A lushbag will eventually evolve in to a sloshbox.
A sloshbox will be on the floor before midnight, everynight.
My sloshbox uncle left all of his beer cans on my front lawn.