Definition of "yup"

One was either a Yup or a Nope, depending upon his answer to that age-old question, "Gotcher deer yet?" I, of course, was still a Nope. Although Yups and Nopes looked pretty much alike they were as different as mallards from mongooses.

1981, Patrick F. McManus, Jack Samson, A Fine and Pleasant Misery, page 196

But you positively must have much, much more than the laconic "yups" and "nups" of the John Waynes and Gary Coopers...

1984, Graduating engineer, Volumes 6-7, page 147

She'd ask him a question that couldn't be answered by a "yup" or a "nope.

1999, Caitlyn's Cowboy, page 33

It was just Yup or Nope. One thing I did notice, though, was that there was no pattern to the Yups and Nopes.

2002, Tom Magliozzi, Ray Magliozzi, Greg Proops, In Our Humble Opinion: Car Talk's Click and Clack Rant and Rave

Petey's end was all yups and nopes. And an okay.

2003, Susie Moloney, The Dwelling, page 278

His hands moved, gesturing towards the two bidders, enticing them to raise their stakes against each other, as he chanted a litany of numbers followed by “going once, going twice” only to be followed by a resounding “yup” as he turned, alternately, towards each of the two men.

2015, Sarah Price, Second Chances: An Amish Retelling of Jane Austen's Persuasion

A rotating cast of auctioneers unleashed a torrent of increasingly high bids, speaking at a machine gun's pace while a chorus of increasingly aggressive "yups" emerged from the audience.

2017 August 17, Michael Siebert, “Picking the bones at Smurfit-Stone”, in Missoula Independent

What we have these days is a diverse spectrum of yuppiness: guppies, buppies, indie yups, paleo-yups, luxe yups, schlub yups, dharma yups, tyro yups, crypto-yups.

2008, Jeff Gordinier, X Saves the World

He idled at a red light, saw two yups in matching cranberry crewnecks and khaki cargo shorts sitting on the pavement outside what used to be Primo's Pizza.

2010, Dennis Lehane, Mystic River

Maxine has joined her sister Brooke's state-of-the-art health club Megareps around the corner but isn't quite used yet to this nightly spectacle of yups on treadmills, plodding to nowhere while watching CNN or the sports channels […]

2013, Thomas Pynchon, Bleeding Edge, Vintage, published 2014, page 448