on the line

US /ɑn ðə laɪn/
UK /ɑn ðə laɪn/
"on the line" picture
1.

at risk; in a position where one might lose something important

:
His reputation is on the line with this new project.
Many jobs are on the line if the company fails.
2.

on the telephone

:
I have Mr. Johnson on the line for you.
Please hold, I have another call on the line.