为所欲为

act wilfully; do whatever one likes; have one's own way; disregard others; do as one pleases; act on one's own will; be free to do what one likes; be master of one's time; be one's own man; do everything freely; do just as one please; do whatever one likes (pleases); do whatever one wants to do; have (take) one's (full) swing; stop at nothing; act willfully