上大號

上大号
shàngdàhào
(coll.) to defecate; to poop

CEDICT

colloquial

Entry Composition

1 上 shàng
  1. (bound form) up; upper; above; previous
  2. first (of multiple parts)
  3. to climb; to get onto; to go up
  4. to attend (class or university)
  5. (directional complement) up
  6. (noun suffix) on; above
2 大號 dàhào
  1. (music) tuba
  2. (of clothes, print etc) large size; large format
  3. (polite) your (given) name
  4. (coll.) number two; poop; to defecate