Verb
make head nor tail of (third-person singular simple present makes head nor tail of, present participle making head nor tail of, simple past and past participle made head nor tail of)
(in the negative) To fail to make head or tail of; not to understand at all.
The Liberals are the flying saucers of politics. No one can make head nor tail of them and they never are seen twice in the same place. John Diefenbaker