An affectionate stokey word, similar to "love" or "mate"

What looks like a duck, swims like a duck, and quacks like a duck, is a duck (probably).
Where duck is used as a metaphor for something usually totally unrelated to ducks.

Avoiding someone or something

A duck is a bird thing. It swims. It's also a replacement for the word fuck

Duck, a Water creature, also Apple likes to duck you over when your trying to say "Fuck"

When your friend is a scum and won't drive you home after sneaking out.

To search something using the search engine DuckDuckGo. Used the same way as to google.