the very thing
Exactly what is most ideal, desired, or useful in a particular moment or situation. I'm telling you, when you're hungover, a big basket of French fries is the very thing! I have the very thing to wear with a dress that color.
very thing
Fig. the exact thing that is required. The vacuum cleaner is the very thing for cleaning the stairs. I have the very thing to remove that stain.
very thing, the
Exactly what is needed or wanted, as in That hat's the very thing to complete the costume. This idiom, which uses very to denote exact identity, was first recorded in 1768.