Stay in your lane

Meaning

A warning to mind your own business or stay within your area of expertise. It is a modern way of saying do not meddle in affairs that do not concern you.

Assertive, protective

Used in a sentence

• I appreciate your input on marketing, but please stay in your lane regarding the engineering specs.
• If you do not know how the software works, you should probably stay in your lane.
• He needs to learn to stay in his lane and stop questioning my methods.