Omaha is considered, by some, to be the hardest game of Poker to master. Of all of the different games of Poker, Omaha is for many the hardest to learn to play and the hardest to bluff in. It is played most often at fixed limits, like Texas Hold'em and pot limit.

A slang term for the starting hand of AxKx in hold'em, named for the former professional tennis player and model (a cynical reference to the hand looking better than it plays).

Bet is a slang term of affirmation, agreement, or approval along the lines of Cool!  or I'm down!  It can also suggest doubt or disbelief: Yeah, sure. 

Yes/No betting is simply betting for or against an outcome or statement. For example, Will Man United beat Liverpool? , and then the punter bets yes or no against the given odds.