xiāo yáo zì zai
free and at leisure (idiom); unfettered
outside the reach of the law (of criminal)
at large
xiāo yáo fǎ wài
unfettered and beyond the law (idiom); evading retribution
getting away with it (e.g. crimes)
still at large
xiāo yáo zì dé
doing as one pleases (idiom); foot-loose and fancy free