Originally Posted by
rdrr
PC stands for pound chat, it's the Neopian Pound neoboards where everyone trades their pets.
BD stands for battledome so a BD-UC is a UC pet with high battledome stats.
The guides are written by users on petpages that tell people the "value" of their pets and whether an offer is fair or not.
HSD stands for health, strength, and defense, and it's the sum of the (important, since agility doesn't really do anything) stats of a pet.
Oh also cupcakes refer to the birthday cupcakes you get when it's your pet's birthday. Different coloured cupcakes give you different stats. So you can use those cupcakes to raise the stats of a pet.