What mean I'll sue him *biblically* until he thinks lawyers are falling outta the sky like frogs?

When people speak of "biblically" they usually are thinking of the plagues in Egypt. Frogs do occasionally fall from the sky. Nobody knows the first fact about it, but it does happen. When people talk about preparedness for legal battles, the usual expression is "room full of lawyers". But this fellow is talking about an unimaginable excess, comparable to God's demonstration of His holy powers: raining lawyers.

"Six inches" refers to a news story in the USA when private property was seized by government action and given to a private company to build a museum. The title to the land was not done exactly right and the original owners retained six inches, which they used to erect a sign expressing their grievance.

You have found some very rare examples of very ambiguous references.