FAST a.
Given to pleasure seeking; disregardful of restraint; reckless; wild; dissipated; dissolute; as, a fast man; a fast liver. Thackeray. Fast and loose, now cohering, now disjoined; inconstant, esp. in the phrases to play at fast and loose, to play fast and loose, to act with giddy or reckless inconstancy or in a tricky m…