Slapping up: the act of talking incessantly without tangible action. Running on.

A derivative of the phrase "slapping up your gums"

Example: "all these people running on about mining in Andros and letting Bahamians benefit from our resources. If they haven’t visited the DEPP website to read and comment on the draft mining or access and benefit sharing legislation, they are just slapping up."

https://www.depp.gov.bs/public-notices/