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tide (one) over
To maintain, sustain, or support someone through a lean or difficult time until something specific happens. Here, have a banana, it should tide you over until lunch. I'm still waiting for the next full-fledged sequel to come out, but this TV miniseries will tide me over for now. Could you loan me $20? I just need it to tide me over until I get paid on Friday.
tide someone over (until something)
to supply someone until a certain time or until something happens. Will this amount tide us over until next week? There is enough food here to tide over the entire camp until next month. Yes, this will tide us over.
Support through a difficult period, as in I asked my brother for $100 to tide me over until payday. This expression alludes to the way the tide carries something. [Early 1800s]
To sustain or support someone or something through a period of deficiency or absence: A $100 loan would tide me over till payday.