Drop anchor

[…] had emigrated first to one country, then to another, till he finally dropped anchor in London.

Junkyard Dog always stopped for lengthy bathroom breaks by announcing his intentions in advance, using a different euphemism every time, saying, to name a few, "I have to: drop anchor... do some paperwork... lay some foundation... pinch a loaf... lighten my load...."

And if you think things are bad after opening the piss box, imagine the smell after I drop anchor.

POSH is the perfect alternative to . . . stopping in a filthy, germ-infested public restroom to drop anchor. . . . Instead, the POSH Stow and Go offers people a private, clean bathroom experience.