I heard this in a conference call.

Problem:
This is a mispronunciation of an idiom often heard in American English.

Explanation:
The speaker in the conference call was trying to indicate to use a manner of speaking at the end of his statement.

Instead, he probably was unaware of the correct words in the idiom.

So he pronounced what he probably believed that he had heard others say.

Solution:
“… , so to speak.”