There are many different abbreviations used by people on TPMRPG so it is improtant to know what they are. Credit to Mitran for posting most of these on the User Created Guides section of the  forum.

 IG: In Game

 FT: For Trade

 FS: For Sale

 FTP: For Training Prize

 UFT/UFS/UFTP: Up For Trade/Sale/Training Prize

 NFT: Not for Trade

 Ob: Obtainable

 Unob: Unobtainable

 RP: Roleplay

 LF: Looking For 

 Pkmn: Pokemon

 SML: Secret map legendary

 Will update in the future if i missed any/if new ones are created.