goo

Etymology 1

American English, attested since 1903, possibly from burgoo (“thick porridge”); alternatively, an alteration of glue.

noun

1. (uncountable, informal) Any semi-solid or liquid substance; especially one that is sticky, gummy or slippery, unpleasant, and of vague or unknown composition, such as slime or semen.
   I stepped in some goo and had a terrible time getting the sticky stuff off my shoes.
2. (figurative) Excessive, showy sentimentality.

verb

1. (transitive) To apply goo to something.
   They gooed their hair with some fragrant styling product.

Etymology 2

Onomatopoeic of baby talk.

noun

1. A noise made by a baby trying to imitate speech.
   The infant's goos and gahs were endearing.

verb

1. (intransitive) To produce baby talk.
   The baby gooed while daddy made sappy faces at it.
   The baby gooed but didn't let go; instead he decided he would taste it. Lou quickly tried to get the baby to release his trophy but to no avail. 2010, Frances Gaddy Stegall, Rafter T Ranch, page 179
   The baby gooed. Danny smiled. 2013, Susan Meier, A Father for Her Triplets: Her Pregnancy Surprise, page 359

Etymology 3

See go.

verb

1. Elongated form of go.
   Lowry put out a social media post to his more than 907,000 Twitter followers saying, "Miami Heat X Kyle Lowry" and "Let's Goo!!" followed by five fire emojis. 2021-08-02, Neil Davidson, “Kyle Lowry era over in Toronto as Raptors great signs with Miami Heat”, in CBC
2. (Northern England, Scotland) Pronunciation spelling of go.
   Well, then, things are settled, an' I'll goo an' finish yond pigs off," said my new employer, rising from his chair, and flapping his crush hat upon his head as if he was killing flies. 1886, Benjamin Brierley, Cast Upon the World - The Story of a Waif, Heywood, page 218