That's a no-go.
That's a no-go.
That's a no-go" is a straightforward way of saying that something is not possible or permitted. This slang is commonly used in casual conversations to plainly state that an idea or proposal is off-limits or cannot proceed.
Sorry, heading to the beach without sunscreen is a no-go.
The speaker emphasizes that going to the beach without sunscreen is unacceptable.
At this stage of the project, skipping the review stage is that's a no-go.
The speaker states that skipping the project review stage at this stage is unacceptable.
Paddling out in this weather? That's definitely a no-go!
The speaker firmly states that paddling out in the current weather is definitely unacceptable.