探頭探腦

tàntóutànnǎo

pop one's head in and look about

* * *

tan4 tou2 tan4 nao3

to stick one's head out and look around (idiom)

* * *

探頭探腦|探头探脑 [tàn tóu tàn nǎo] ► to stick one's head out and look around (idiom)