drop anchor

verb3

1. •
   To release the anchor of a ship or boat, allowing it to fall to the bed of a body of water and thereby securing the vessel in place.
2. •
   To stop travelling and settle down.

   • […] had emigrated first to one country, then to another, till he finally dropped anchor in London. — 1895
3. •
   (euphemistic) To defecate.

   • And if you think things are bad after opening the piss box, imagine the smell after I drop anchor. — 2011