(slang) To lie low.

Third-person singular simple present indicative form of duck down

(slang) Wearing no clothes below the waist.

plural of mud duck

Alternative form of if it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck

A subject can be identified by observing its habitual characteristics.

The platypus

An exclamation of surprise.

(idiomatic) All or nothing. Probably derived from "shoot duck or no dinner".

(cricket) To score one's first run in an innings. / (idiomatic, Britain, by extension) To do something for the first time.