A left-arm unorthodox spin, more commonly known as a slow left arm Chinaman (SLC), is a type of delivery used in cricket by a left arm bowler. The bowler will use his wrist to spin the ball in order for it to turn from off to leg for a right handed batsman. This exactly mirrors a leg spin bowler (who bowls right handed). A Slow Left Arm Chinaman bowler may also have a "googly" ("wrong'un" in Australia) which turns in the opposite way in order to trick the batsman.

This style of bowling is very uncommon, as it is a difficult style of bowling to master, and the natural "turn" into right-handed batsmen is usually less dangerous than the spin away from the batsman generated by a left-arm orthodox spin bowler. Very few specialist bowlers of this type have played at Test level: the South African Paul Adams, perhaps the most recent (although his technique is highly unorthodox in every sense of the word) and Michael Bevan bowled this style as an all-rounder in the Australian team for periods in the 1990s.