Good Omaha Action in LV

[PhatCasino]

dont wanna play any hi/lo crap...
wheres the best game in town?
also what does kill and half-kill mean...

[lucas9000]

i don't think you'll find an omaha high only game in vegas outside the big mixed games at bellagio.

[PhatCasino]

orleans:
Omaha Hi: 4-8-8 (with half-kill), 6/12 (with half-kill).

can someone explain what 4-8-8 means and half-kill
and when they don't note that it's omaha hi, is it hi/lo by default?
thanks