你是孙猴子请来的逗比
[nĭ shì sūn hóu zi qĭng lái de dòu bĭ]
Playfully refers to someone (you) being brought by Sun Wukong (the monkey king in Chinese mythology), known for his mischief and humor, to liven up or mock. 'Doubi' can also directly mean someone silly, funny.