The two letters of the word ox represent, in East Asia, "yes" and "no." On TV talk shows in Taiwan, the members of the studio audience are often given a pair of signs marked O and X, which they can hold up to show agreement or disagreement with something.This fits with the Western tradition of describing a dilemma as a beast with two horns. And of course in the famous Japanese koan, one un-asks an impossible question by saying mu -- or, to English the spelling, moo.
Omicron! (as I'm sure you know) was the ancient Greek equivalent of Omigod! -- the reference being to Cronus the father of Zeus.