"Don't play play" - это из синглиша:
From the Hokkien phrase, "mai sng-sng". A warning against hubris: do not fool with things beyond your ability. Often deliberately mispronounced "don't pray-pray".
"Ah Beng has a really bad temper. Better don'ch play-play with him."
See also: Mai Siao Siao Mai Sng Sng