put (something) on the cuff
To purchase something with the promise or obligation of providing payment in the future. I'm not getting paid till next week, but we really need a new TV, so I decided to put this one on the cuff. Be careful not to put too much on the cuff, or you'll end up swimming in debt for years.
put something on the cuff
Fig. to buy something on credit; to add to one's credit balance. I'll take two of those, and please put them on the cuff. I'm sorry, Tom. We can't put anything more on the cuff.