Cosher is a 6 letter English word. It's valid Scrabble word worth 11 points. It's valid Words with friends word worth 11 points.
You can make 117 anagrams from letters in cosher (cehors).
1860-65; perhaps conflation of cocker3 with uncertain elements; Hiberno-English cosher to feast, live at the expense of kinsmen (Irish cóisir feast, reti
Then, at the exact second that the ambulance is due, along comes their 'cosher,' knocks down the policeman on duty.