In the blockchain space, slashing is a mechanism used to penalize validators (nodes) for malicious behavior or significant errors. Slashing is used in blockchain networks that use the Proof of Stake (PoS) consensus mechanism. The penalty usually involves the reduction or loss of the validator’s staked assets.

Proof of Stake (PoS) is a popular consensus mechanism that relies on validators to confirm transactions and add new blocks to the blockchain. Validators are chosen based on the amount of cryptocurrency they stake or lock up as collateral. However, to ensure validators act in the network's best interest, there need to be measures to deter and punish dishonest or careless behavior. This is where slashing comes in.