As nouns the difference between poo and farts
is that
poo is (countable|colloquial|often|childish) excrement; faecal matter while
farts is .
As verbs the difference between poo and farts
is that
poo is (colloquial|often|childish) to defecate while
farts is (
fart).
As an interjection poo
is (colloquial|euphemistic) expression of displeasure or failure; shit!.