My limited experience with Omaha Hi comes from the freerolls at Jetset, NL Omaha Hi is an amazing crapshoot for the first half hour.
I have folded: ,
,
even .
Something in my mind tells me that there is no chance with a hand like that.
I just wonder if I was right to fold , knowing that the other ace is probably not going to show.

I have finished in the top 45(ITM for gopoints) 30% of the time.

I think the worst non-trips or quads hand would depend on how many opponents you were up against and a few other factors (as well as what hand it is up against, of course some hands will do better against others). I would hazard a guess that 2233 will not play too badly against a big field but heads up will be a pretty huge underdog to most random holdings. Just guessing really!

Monk
xxxxx

Q762 rainbow...always a winner, except again another hand.

Cardplayer has the Omaha calculator...you could figure out what hand play worst against the best starting hand AA23 double suited...that might key you into the worst hand out there.

But, I think it's pretty easy to identify a crap hand...it's harder to identify a playable one IMO...and really easy to convince yourself the hand you are holding is playable when it really isn't.