also finger-tip
(~s)
1.
Your ~s are the ends of your fingers.
The fat and flour are rubbed together with the ~s as for pastry.
N-COUNT: usu pl
2.
If you say that something is at your ~s, you approve of the fact that you can reach it easily or that it is easily available to you.
I had the information at my ~s and hadn’t used it.
PHRASE approval