Origin in English/Australian cricket vernacular, drinking sessions at pubs can be scored using cricket scoring format of wickets/runs (Aus) or runs/wickets (Eng), where runs are drinks, and having to urinate is a wicket.
You might tell your mates as you stand up that you just lost another wicket.
1. "Damn it guys, just lost another wicket"
2. "Geez mate, if you lose a wicket this early you'll be up and down all night"
3. "I opened well, but am suffering from a middle-order-collapse (denotes a quick succession of wickets)"