香蕉你个巴拉21柠檬你个思密达2
[xiāng jiāo nĭ gè bā lā 21 níng méng nĭ gè sī mì dá 2]
It's a funny and nonsensical phrase, using random words mixed with numbers. “Banana” and “lemon” are often used for comic effect, similar to gibberish phrases in other languages. 'Si Mi Da' sounds like an exaggerated expression of frustration or amusement.