| a chattering or flighty, light-headed person. |
| a gadget; dingus; thingumbob. |
| pay back | |
| —vb | |
| 1. | to retaliate against: to pay someone back for an insult |
| 2. | to give or do (something equivalent) in return for a favour, insult, etc |
| 3. | to repay (a loan) |
| —n | |
| 4. | a. the return on an investment |
| b. Also called: payback period the time taken for a project to cover its outlay | |
| 5. | a. something done in order to gain revenge |
| b. (as modifier): payback killings | |
pay back
Repay a debt or a loan, as in I'll pay you back next month.
Also, pay back in someone's own coin. Revenge oneself, repay in kind, as in He thought he could get away with copying my plans, but I'll pay him back in his own coin. This expression refers to repaying a debt in exactly the same currency in which the money had been lent. [c. 1600]