goo

Short definition from Wiktionary

Noun

1. 1
   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.
2. 2
   Excessive, showy sentimentality.
3. 3
   A noise made by a baby trying to imitate speech.
4. 4
   Initialism of gastric outlet obstruction.

Verb

1. 1
   To apply goo to something.
2. 2
   To produce baby talk.
3. 3
   Elongated form of go.
4. 4
   Pronunciation spelling of go.

Proper noun

1. 1
   A surname.