noun

• (uncountable, childish) Feces.
  "Poo... feces."
• (countable, chiefly UK, childish) A piece of feces or an act of defecation.
  "That doggy's doing a poo."
• (uncountable, slang) Cannabis resin.

verb

• (intransitive, childish) To defecate.
  "The dog practically has to poo on his shoe before he can make the pinch."
• (transitive, childish) To dirty something with feces.
  "Most babies I knew then had on introduction either howled or pooed their pants."

intj

• (euphemistic) Expressing annoyance, frustration, etc.: a minced oath for 'shit'.
  "Petulant and pouty, Stephanie herself says things like, ‘Oh, poo.’"

noun

• (slang) Clipping of shampoo.
  "Why I Cut Down on the “Poo”: A Note from Melissa […] People are saying no to “poo”—shampoo, that is. A very famous hairstylist to the stars (who has gorgeous hair himself) admits that he never washes his hair with shampoo. He’s not the only one to swear by the no-poo approach."
• (slang) Champagne.
  "Who wants another glass of poo?"