be walking on eggshells

be walking/treading on eggshells

if you are walking on eggshells, you are trying very hard not to upset someone
Usage notes: An eggshell is the hard outside covering of an egg which breaks very easily.
It was like walking on eggshells with my father. The smallest thing would make him angry.
See also: eggshell, on, walking
References in periodicals archive ?
But then we've come to this now where everybody has to be walking on eggshells - kind of very.
The watchful hosts are likely to be walking on eggshells around the Bird's Nest stadium, confident of their global status but conscious of a cynical Press ready to pounce," he writes.