stash (something) in (something)
To secrete, hoard, or store something inside of something else. Please, just stash these drugs somewhere in your house—the cops will never look for them there! Why do you stash the chocolates in the back of the cupboard like that? It's like you're trying to hide them from me. I'll stash the presents in my office so we won't have to worry about Tommy accidentally finding them before his birthday.
stash something in something
to put or shove something into something; to store or hide something in something. You should stash your food in a place that is safe from bears when you go camping. I stashed my clothes in my suitcase and called a taxi.