ring off the hook
Of a telephone, to be ringing constantly or very frequently. The image is of the phone ringing so frequently that it falls off the cradle or wall attachment. Gosh, I'm exhausted. The phone was ringing off the hook all day at work! Ever since we announced the 2-for-1 deal, our phones have been ringing off the hook.
ring off the hook
Fig. [for a telephone] to ring incessantly and repeatedly. What a busy day! The telephone has been ringing off the hook all day long. The telephone has been ringing off the hook ever since the ad appeared in the paper.
ring off the hook
(of a telephone) be constantly ringing due to a large number of incoming calls. North Americanˌring off the ˈhook
(American English) (of a telephone) ring many times: The phone has been ringing off the hook with offers of help.ring off the hook
in. [for a telephone] to ring endlessly or constantly. The phone was ringing off the hook when I came in.