Also for taking a leak - "shaking hands with the unemployed"
Checking out the wife's wedding present
going for a squirt
Busting for a Snakes (Snakes hiss - piss)
Then of course on a larger scale
Big jobs
going for a Tommy (TOm Tit)
Going to bomb Pearl Harbour
Going to drop the kids off at the pool

the list goes on......and on.

cheers

Bugsy