Hello there, Wasp! Welcome to the WoFMB! My name is Riri, I'm here if you need anything!
Continuing on what Swampy said:
RP: RP stands for RolePlay, a term used where people create characters and act out as them in scenarios inside of one thread.
FWRP: FWRP stands for Forum Wide RolePlay, which is where it shares a similar concept to the ever-timeless roleplay: Instead of sticking to one thread, the FWRP is broadband, where people can make new plots (with approval, of course) and new threads roleplaying certain actions.
GGaD: GGaD is a FWRP, standing for Gods, Goddesses And Deities. In that FWRP, people create Deities, Demigods, and OCs and roleplay as them.
HoaW: HoaW stands for Heart Of A Warrior, which is a popular Forum Wide Roleplay with Warrior Cats, if i'm not mistaken.
ML: ML stands for Miraculous Ladybug. It is a FWRP based off of the popular french animated show, Miraculous: Tales of Ladybug and Chat Noir.
Siggy/Sig: A Siggy/Sig is a term used for someone's signature.
Bump, Nudge, Up, Boop: All terms used to put a thread that has sunk to somewhere other than the front page to the front page.
Enjoy your time here!