A particularly large and pleasing turd, that has been gestating for a week or so in the bowel area; also a derogatory term of endearment.
1)Alan you fucking arse marrow, where's my screwdriver.
2)My butt is hanging in tatters, you should have seen the size of that arse marrow!
2)My butt is hanging in tatters, you should have seen the size of that arse marrow!
by PJ January 1, 2005
Get the arse marrow mug.