"Duck it" is used sometimes as a replacement for "Fuck it!". Also it suggest to "duck out of", ie avoid, something or just to "duck", ie dodge by crouching or bending down.

I can see the idea of a duck diving down to retrieve a tasty bit of food (weed!).

How about "pekin", it's the name of a duck and suggest "peek in" to me. Sadly pekin.com is squatted but then what isn't. It's slightly awkward for "pekin it". Or "scoter", another duck; sounds like "spotter" and could be used as "scot it" which also sounds like "[he]'s got it".

Not really there but, some thoughts anyhoo.