Quite a few colorful additions to the political lexicon back then...
The "plumbers," "Deep Throat," the "Saturday night massacre," the "18-1/2 minute gap," "twisting slowly, slowly in the wind," etc.
I think the "modified limited hangout" was Ehrlichman's creation.
As an aside, my wife's cousin, Mike Scott, successfully defended Richard Kleindienst on perjury charges in '81, grilling none other than then Arizona governor Bruce Babbitt on the stand.
"modified limited hangout" was even better than "plausible denial".