I am translating a Till Eulenspiegel story from German to English, and I encountered the following sentence (source, see section 22]:
Eulenspiegels Frechheit brachte den braven Mann vollends auf den Baum.
[The preceding context is that the baker, for whom Till Eulenspiegel worked, left him alone in the bakery to bake, and when Till asked what should he bake, the baker answered sarcastically "Eulen und Meerkatzen", with Till doing exactly that, which angered the baker very much when he found out.]
So, I figured that the bolded phrase in the quoted sentence above may be an idiom, but I couldn't find it in my online and offline dictionaries, nor in Redensarten-Index, so - what does it mean?