My way or the highway
Definition 1 of 1
Pro Tip 1/3Assertive Tone
The phrase expresses a strong demand or ultimatum, often seen as bossy or uncompromising. 
In team meetings, he always insists on 'my way or the highway,' which frustrates us.
Pro Tip 2/3Not for Arguments
Use it to show firm decisions, not when you're open to discussion or negotiation. 
When it comes to safety rules, it's always my way or the highway.
Pro Tip 3/3Informal Context
It's casual and might not be suitable for formal situations, like business negotiations or academia. 
I run a tight kitchen; it's my way or the highway.