play first fiddle

blink first

To be the first party in some situation to give in or back down.

cast the first stone

To act self-righteously in accusing another person, believing oneself to be blameless.

child's play

Something particularly easy or simple.

come first

To win first place in a competition.

director of first impressions

A receptionist.

feet first

In the manner of a deceased person (i.e., dead).

fiddle while Rome burns

To neglect helping when one’s time is needed most; to ignore the major problem at hand (whilst doing something less important); to be idle, inactive, or uninterested in a time of great need.

first among equals

A person or position that is formally of equal rank to others in a group, but nonetheless takes a leading role within that group.