Having a dull sound; lacking resonance.(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 "tubby" in a sentence
"By calling you a teletubby was she infering that you were looking a little 'tubby' or just plain weird"
""She's rather dim and kind of tubby - undereducated and undersexed - and she displays a distressing affinity for mom jeans and sweaters covered in puffy paint and appliquéd kittens.""
"I've been thinking of something along similar lines - where men boys/guys/young males - whichever term suits best use terms such as tubby, d*ckhead as almost pet names in conversation with each other."