A drunkard’s arsehole has no owner, does that mean it’s free use for anyone?
Yup, pretty much. In other words: someone who’s drunk has poor judgment, sense of self-preservation and self-control, so it’s really easy to take advantage of the person. The saying takes it on a physical sense (being fucked in the arsehole), but it might be as well someone “encouraging” you to do stupid, sometimes even dangerous shit, that does not benefit you.
Yup, pretty much. In other words: someone who’s drunk has poor judgment, sense of self-preservation and self-control, so it’s really easy to take advantage of the person. The saying takes it on a physical sense (being fucked in the arsehole), but it might be as well someone “encouraging” you to do stupid, sometimes even dangerous shit, that does not benefit you.