A simple greeting often used from afar. Sometimes considered antiquated but still fun to say.
"Oh, look. Here comes Jill. Yoohoo! Jill!"
by ths1161969 November 18, 2011
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Slang for the children of a single mom. Deriving from the fact that if you sleep with her and spend the night, you will have to buy her kids a yoohoo the next morning.
Bro, I am dating a hot divorced chick...

Make sure she does not have any yoohoo's...
by B. Hanback January 17, 2008
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a word sometimes used to convey excitement, particularly on facebook, by idiots who don't know that the word is just a chocolate drink. it should be woohoo.
it's friday! yoohoo!
by theonlyjason November 23, 2009
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A chocolate drink, but can also refer to really bad diarrhoea (yes that is spelled right).

Other diarrhoea slang: gippo guts
I've had the flu, so I wasnt at work for a while because I have spend the last week rocketing yoohoo out of my ass.
by WordGenie April 15, 2004
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Can be used to express praise when used in the following phrase: "sweeter than yoohoo".
Man, that was sweeter than Yoohoo!
by Kelly Barbosa January 26, 2005
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A yoohoo is someone obsessed with a certain muppet. Her home is usually R&S on yahoo answers and she trolls uncontrollably. A Yoohoo also makes others mad by stealing aways muppets. She is also obsessed with the Disney Princesses and she despises report monkeys.
Girl: Stop pissing off the parenting section on yahoo answers. You are such a Yoohoo!
by mymouth February 06, 2010
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