fat chance INFORMAL
used to say that you definitely do not think that something is likely to happen:
"Perhaps they'll invite you." "Fat chance (of that)!"

[TahlilGaran] Advanced Learner's Dictionary ▲

fat chance
there is very little or no possibility of that happening.
Will Hal make you laugh? Fat chance.

Usage notes: usually used as a separate sentence to remark on what was just said, as in the example

[TahlilGaran] English Idioms Dictionary ▲

Fat chance!
[informal]
something that you say which means something is not very likely to happen.
'D'you think your Dad'll drive us to the disco?' 'Fat chance!'

[TahlilGaran] English Idioms Dictionary ▲

fat chance
little or no possibility, almost no chance
Fat chance that my friend will let me borrow his car. He never lets me borrow anything.

[TahlilGaran] English Idioms Dictionary ▲

fat chance
n. phr., slang Little or no possibility; almost no chance.
A high school team would have a fat chance of beating a strong college team.
Jane is pretty and popular; you will have a fat chance of getting a date with her.
Compare: GHOST OF A.

[TahlilGaran] English Idioms Dictionary ▲