The phrase "as a stash" is correct and usable in written English.
It can be used to refer to a hidden or stored supply of something, often in a casual or informal context.
Example: "He kept his money as a stash in a secret compartment of his desk."
Alternatives: "as a reserve" or "as a supply".
She said the police had identified the property as a "stash house" before the device was attached to his car.
But he also stores his wife's jewelry in there, as well as a stash of emergency cash and a backup hard drive for his computer.
It's not what one hopes for when thinking about an afterlife ("I'd like for my head to be used as a stash box"), but I didn't let that bother me.
Prosecutors said the Goodfellas used one member's apartment on 126th Street as a stash house for guns, which were available to gang members to settle disputes with rival gangs.
He said if out-of-town dealers try to set up shop in Ansonia, they stick out like a sore thumb but some do use the town as a stash house.
Her mother's apartment was no better: a dealer was using one of the bedrooms as a stash house, and with all the traffic, Lolli worried for the safety of her daughters.
* Don't rule out your garage as a stashing area.
The haggling between Cuban exiles and criminal figures was recounted in a July 4, 1964, memo by the F.B.I. that was marked "SECRET" and released in full on Thursday as part of a stash of files related, if sometimes only theoretically, to the assassination of President John F. Kennedy.
Not to worry, as I have a stash in my pack.
Others, such as the owner of a stash of old Jewish-deli menus, weren't as forthcoming.
You take drugs with you wherever you go, and you have a stash at home as much as possible so you never run out.
