beshit

verb2

1. •
   (vulgar) To soil with excrement; to defecate on (something).

   • He looked like one that had beshit the roast. — 1562
2. •
   (vulgar, figurative) To soil; to spoil; to defile; to befoul.

   • Man has an inexhaustible ability to beshit his environment, with politicians well in the lead. — 2003