as if there was/were no tomorrow

as if there was/were no tomorrow

Very rapidly and eagerly; without restraint or thought (i.e., as if there won't be another opportunity, so one must do something as much or as quickly as possible). He must have been starving, because Jonathan started wolfing down his food as if there was no tomorrow! Every time Kevin goes out shopping, he starts spending money as if there were no tomorrow.
See also: if, no, there, tomorrow