[thackney]

I did a little checking with Dictionary.com in an attempt to not make this quite so subjective. Sorry, TheMom, but I find little to match with him.

The tame or domestic ass is patient, slow, and sure-footed, and has become the type of obstinacy and stupidity.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.

a pompous fool
WordNet ® 1.6, © 1997 Princeton University

The ass is an unclean animal, because it does not chew the cud.
They were noted for their spirit and their attachment to their master.
The wild ass was distinguished for its fleetness and its extreme shyness.
Easton's 1897 Bible Dictionary

Synonyms: blockhead, bonehead, dolt, donkey, dope, dunce, fool, halfwit, idiot, imbecile, jackass, jerk, nincompoop, nitwit, numskull, schmuck, simpleton, twerp, twit
Roget's Interactive Thesaurus, First Edition (v 1.0.0)

[TheMom]

I stand corrected!! With the exception of sure-footed, Eaker is none of the following - patient, slow, and sure-footed, and has become the type of obstinacy and stupidity.

Thanks for the chuckle.