悟空给师傅抓个妖精玩玩
[wù kōng jĭ shī fù zhuā gè yāo jīng wán wán]
It means 'Wukong catches a demon for the master to play with'. It derives from a classic novel Journey to the West. Wukong(Sun Wukong) catches demons and protects the Tang Monk(Tripiṭaka). Here, it might be used humorously indicating someone wants to challenge trouble.