話は聞いたことがない

I've never heard such a thing

→ 話
phrase Rare #32,361
I've never heard such a thing A phrase used to say that something is unfamiliar or surprising. The pattern ~たことがない means "have never done ~"; 話 can mean "story," "matter," or "thing" depending on context.
JA: そんな面白い話は聞いたことがない。
EN: I've never heard such an interesting story.

生まれてこのかたそんなひどい話は聞いたことがない

I've never heard anything so terrible in my entire life.

そんな途方もない話は聞いたことがない

I've never heard anything so far-fetched.

そんなひどい話は聞いたことがない

I've never heard anything so awful.

そんな奇妙な話は聞いたことがない

I've never heard such a strange story.

これほどわくわくする話は聞いたことがない

I've never heard a story this exciting.