I was never distinguished for address, and have often even blundered in making my bow.
Goldsmith.

Yet knows not how to find the uncertain place,
And blunders on, and staggers every pace.
Dryden.

To blunder on. (a) To continue blundering. (b) To find or reach as if by an accident involving more or less stupidity, -- applied to something desirable; as, to blunder on a useful discovery.

He blunders and confounds all these together.
Stillingfleet.

Syn. -- Blunder, Error, Mistake, Bull. An error is a departure or deviation from that which is right or correct; as, an error of the press; an error of judgment. A mistake is the interchange or taking of one thing for another, through haste, inadvertence, etc.; as, a careless mistake. A blunder is a mistake or error of a gross kind. It supposes a person to flounder on in his course, from carelessness, ignorance, or stupidity. A bull is a verbal blunder containing a laughable incongruity of ideas.