Waxing wroth

Is there such a phrase as "waxing roth" --- meaning, I think, to be very upset or mad?

I recall that phrase was included in a Marx Brothers movie, the one where Groucho is president of a university. He's in his office and in comes his secretary; the secretary reminds him that an important visitor has been waiting very long to see Groucho and that the latter has kept the visitor waiting.

The secretary says, "(the visitor) is so upset at being kept waiting -- he's waxing roth." Groucho, as only he could do, quips, "Well tell him to wax someone else!"

You were close. It's spelled wroth.

For your further enlightenment: "Waxing" means "becoming" or "growing," as in "a waxing moon," one that (apparently) gets bigger. "Wroth" is an archaic word for "wrathful." ~rb

In "Horse Festhers" Groucho is president of Huxley College. Is that the one you had in mind, Bob?
SS

Horse Feathers it is. IMDB.com comes through as usual:

Wagstaff's Receptionist: Oh, Professor, the Dean of Science wants to know how soon you can see him. He says he's tired of cooling his heels out here.
Professor Wagstaff: Tell him I'm cooling a couple of heels in here.
[receptionist leaves and re-enters fifteen seconds later]
Wagstaff's Receptionist: The Dean is furious! He's waxing wroth!
Professor Wagstaff: Is Roth out there, too? Tell Roth to wax the Dean for awhile.
[nudges one professor]
Professor Wagstaff: Guess that's bad, huh?