arse over tit

Adverb

 * 1)  Tumbling; falling; upside-down, unstable or unbalanced.
 * I missed the step and went arse over tit.

Usage notes

 * Sometimes abbreviated and slightly sanitised as A over T

Quotations

 * Then a big Turkish shell knocked me arse over tit / And when I woke up in my hospital bed / And saw what it had done, I wished I was dead. The Pogues’ version of "And The Band Played Waltzing Matilda" by Eric Bogle (1972). In the original, the phrase is arse over head.