it’s no go —(coll.) it is no use; it is impossible:
- Jack tries to get friendly with her but it’s no go. Suzie’s got attitude even Jack can’t handle.
it’s not a go —(coll.)
1. it is not settled:
- It’s not a go at this date. If enough members indicate they want a convention we will have one.
2. = it’s no go:
- When you don’t speak Spanish, it takes a while … I tried tourist places just asking, but without a common language it’s not a go.
See also: it’s all go / it’s all the go.