I've always understood bootstrapping in the context of startups to mean that the business achieves sustainability through customers, not loans, equity deals, etc.
Ash Maurya has a blog post from a few years ago that appears to define bootstrapping as the above, plus that the product is developed without any customer feedback before the product is ready to sell.
To me, this sounds like the "Lean Startup" myth, that being before the lean startup approach that startups did not talk to customer before they had a product to sell.
Is Ash Maurya's use of the term bootstrapping a commonly understood use of the term?
SOURCE: "Bootstrapping a Lean Startup"