Like any aspect of poker, staking has several terms/words that are used that may be confusing if you've not heard them before. Listed below are the main ones along with a description of what they mean -
BAP - BAP is short for 'Buy A Piece'. This is where an investor can buy into a particular game or series of games that a poker player wants to be staked on. For example, you could 'buy a piece' for someone who wants to play the Sunday Million one week, or perhaps 50 $11 Sit n gos. The higher the amount you 'buy', the more profit you can potentially make.
Cake - Let's say you previously were staked by someone but lost them money. If that investor re-stakes you, cake is simply the repaying of that lost stake through profits from the new one.
HEEB - This is staking with a specific goal to get the bankroll up to a certain amount. The stake ends either when that goal is complete, a time limit is hit, or the money is lost.
Horse - A horse refers to the poker player who's being staked.
Stable - A group of 'horses' (poker players being staked). A poker investor would refer to his players collectively as his 'stable'.