I was looking for "Belt Fed Wombat". On of my many varied jobs involved working with a great bunch of people who were majoritivly all ex-forces. On of the army guys had a phrase of "Fucks like a belt fed wombat", I asked what a belt fed wombat was. He told me it was a cannon that fired 120mm howitzer shells, and anything it hit was generaly fucked after one.
One of my favourite sayings Rippy

"I was in and out like a belt-fed Wombat...She/He should be able to walk again in a few days"
Edit: The in and out refers to the way the barrel used to recoil when it fired a 25 pound shell