Bing found the following results
Meaning of have your head up your arse in English - Cambridge …
Have head up ass - Idioms by The Free Dictionary
Have your head up your ass - Idioms by The Free Dictionary
Definition of have (one's) head up (one's) ass - The Online Slang ...
Have (one's) head up (one's) ass - Idioms by The Free Dictionary
Understanding Idioms: "Head Up Your Ass" Explained - YouTube
have your head (stuck) up your (own) ass - Cambridge Dictionary
have one's head up one's ass - Wiktionary, the free dictionary
Urban Dictionary: head up ass
The Mysterious Origins of ‘HOOAH,’ The Army’s Beloved Battle Cry