poo /puː/ BrE AmE noun informal
[ Date: 1900-2000 ; Origin: pooh used when you smell a bad smell ]
1 . [uncountable and countable] solid waste from the ↑ bowel s SYN poop American English
2 . [countable usually singular] the act of passing waste from the ↑ bowel s SYN poop American English
—poo verb [intransitive and transitive] informal