push-button
adj.— «Jockeys like to call horses like Big Brown “push button”—they respond to commands instantly and easily.» —“Preakness laugher leaves Big Brown in line for glory” by Pat Forde ESPN.com May 18, 2008. (source: Double-Tongued Dictionary)
Further reading
When there’s no evening meal planned at home, what do you call that scramble to cobble together your own dinner? Some people apply acronyms like YOYO — “you’re on your own” — or CORN, for “Clean Out your Refrigerator...
A librarian opens a book and finds a mysterious invitation scribbled on the back of a business card. Another discovers a child’s letter to the Tooth Fairy, tucked into a book decades ago. What stories are left untold by these forgotten...