While "zap" is not a commonly used term in the context of Bitcoin, there is a company called Zap that provides services related to Bitcoin's Lightning Network. The Lightning Network is a layer 2 scaling solution for Bitcoin that aims to make transactions faster and cheaper. Zap offers a range of Lightning Network-related services, like wallet management and payment processing.
So, in this context, "zap" could refer to a specific type of Lightning Network payment channel that allows for instant and low-cost Bitcoin transactions.