doo

interj. a sound used in music when the singer uses nonsense syllables instead of words.

interj. a nonsense syllable used in scat singing or vocal jazz to mimic the sound of an instrument.

“The backup singers sang 'doo-doo-doo' behind the lead vocalist.”

“The arrangement required the vocalists to perform a series of complex 'doo' syllables to emulate a walking bass line.”

n. a childish word for solid waste from the body, especially from a dog.

n. a juvenile or euphemistic term for excrement, most frequently applied to domestic animals.

“Watch out so you don't step in the dog doo on the grass.”

“The park's new signage reminds owners that failing to clear up dog doo will result in a significant fine.”

Informal