I saw a reference to some monk "walking the earth, eating owl sandwiches". I interpreted it to mean "contemplating", though I'd never heard it.
Then I heard someone on the Sunday news shows use it to mean "eating crow".
I went googling, and found it to be an actual food! I guess. They're not all that consistent. Sounds like kiddie sandwiches with faces cut into the white bread. Is that all it means? Are those supposed to look like owls? Never knew (or thought) that.
I guess the monk just meant eating humbly. Unless someone here can clear up those google results.