Terminology

[Anova]

"proc" is a short term for procedure. It refers to a program procedure that runs contingent on something else. Similarly, some actions only become available once you meet a criteria (mercystroke and misery's end only proc if the enemy is at 20% hp). For example, Thunder has a 5% chance of giving you the buff, thundercloud. Therefore, Thunder procs are used to refer to the buff and actions that result when you cast thunder.

"static groups" are basically a group of players who decide to schedule themselves to meet up for specific game events or raids. This usually includes endgame raids, such as the coil of bahamut. In other words, treat it as you would any meeting with people. Most will be very precise in their desired date and time.

"pug" is short for pick-up group. It is used to refer to a party with players you do not know or have no experience playing with. Usually, it is because you are simply asking whoever is online, available, and looking to join. Nobody knows anybody's playing level, strength, or style. You are literally picking people off the street for your party, hence the name.