What's meaning of "Head my *** up"?

I've had my head up in *** for the past few years.
it means you were a coward.

You have answered your own question

The phrase is 'your head up your azz'. (spelling changed for censor's sake).

To have one's head up one's a s s mean's that person is foolish and oblivious to what's going on. He can't make sense of the simplest things, because after all, his head is up his own a s s.

whats the *** i dnt get it put a letter in it plz x

Heads up means that something unexpected is on the horizon.