Boo is an interjection. When used as the name of a person, it is a proper noun.
"Boo" can be used as an interjection or a noun. It is commonly used to express surprise or disapproval, or as a term of endearment.
how do you start a speech in a youth audience
No, "boo boo" cannot come out of your mouth. If you are referring to making a mistake or error, it is not a physical substance that can come out like food or liquid - it's just a figure of speech.
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
adverb
what part of speech is work
peak a boo
baby boo
baby boo
the part of speech sashay is a averb
Did is a verb, and not is an adverb. Didn't is not any part of speech. It's a contraction of did and not.