Definitions by DocM&M

stain your own lane 

Doing something stupid in your area of expertise

I tell my scientist friend whose comments reveal his prejudices by dismissing the facts, don’t stain your own lane.

stain your own lane by DocM&M August 16, 2020

Backing into your own stink 

Making a mistake that hurts you

While golfing I mistakenly hit/used the wrong club. As a result the ball went out of bounds. Thats backing into your own stink

Backing into your own stink by DocM&M September 4, 2019