gassing
n.— «What Trono and others dread most are “gassings,” when prisoners hurl cups filled with feces and urine or even infected blood at the faces of guards.…Trono has been gassed six times, but never hit in the face.» —“Guards on Death Row Face Escalating Dangers” by John M. Glionna Los Angeles Times Apr. 21, 2001. (source: Double-Tongued Dictionary)