play second fiddle

child's play

Something particularly easy or simple.

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.

go play in the traffic

To go elsewhere and feel free to engage in risky behavior; to get lost.

grandstand play

A successful play or other manoeuvre during a sporting competition in which one or more players shows off unnecessarily in order to entertain or impress the spectators.

hang up one's fiddle

Synonym of hang up one's boots.

have second thoughts

To change one's opinion, or be uneasy about a previous decision.

hold-up play

A play where an attacker retains possession of the ball, while the teammates can move up the field.

just a second

A short period of time, typically anywhere from a few seconds to several minutes or more.