Bad Poetry: Epitaph for a Liar

I've always enjoyed "funny" epitaphs. Given the snarky habits of my mind, I didn't want to write an epitaph for any recently deceased person whose family might be offended by a snarky epitaph. Here is a generic epitaph that rhymes familiar jokes.

When asked, "How could you tell Big Bill was lying?"

The answer was "His mouth its trade was plying."

So lived, and so has perished our Big Bill;

He lied while living, and he lies here still.