Resembling or characteristic of a puppy.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "puppyish" in a sentence
"Canseco, longhaired still, strong-jawed still, has a kind of puppyish charm and a forthrightness that make you want to root for him."
"The jokes worked well, the earnestness of the math student Hal came through as a puppyish eagerness that made it seem like he didn't know most of it was funny, which only added."
"Perhaps the hysteria that greeted his atypically spectacular goal in the Manchester derby had at its core a release of pent-up prodigy anxiety, a reclutching to the maternal bosom, slot-mouthed with buried disappointment, of our puppyish infant-genius."