Refers to ways in which your disguised sets are safe from being challenged. They can't be challenged once you say "Omaha" and or they can't be challenged if one received a disguised set by stealing it or if it was fumbled too them.
Scoreboard
Refers to whatever method one decides to keep track of team or individual scoring.
Sideline Infraction
A non-player who tries to tell people what you have or influence the game in any manner when they are not apart of it. There is no actual penalty for this, but you can create a house rule.
Single set option
The ability to discard without picking up a card if you have at least one set downed.