不要鸡动要蛋定
[bù yào jī dòng yào dàn dìng]
This username humorously advises oneself to stay calm ('egg-steady') and not panic ('chicken move'). It plays on the谐音 (homophonic puns) of chicken sounding like 'jīdòng' (to be excited or panicking) and egg sounding like 'dǎndìng' (being steady or calm).