present participle of chance one's arm

Third-person singular simple present indicative form of chance one's arm

(informal) A negligibly small chance; used primarily in negative constructions to express the idea of 'not even the smallest chance'.

Variant of a snowball's chance in hell.

Alternative form of chance'd be a fine thing

To not believe that someone will achieve their stated aim.

There is no guarantee that you will get the result you want.

Alternative form of you pays your money and you takes your chances