bm

BM (http://definr.com/BM)

     n 1: solid excretory product evacuated from the bowels [syn: {fecal
          matter}, faecal matter, feces, faeces, BM, stool,
           ordure, dejection]
     2: a euphemism for defecation; "he had a bowel movement" [syn:
        bowel movement, movement]