To be annoying, stupid, etc. Lumpatious is usually used as an insult to someone who thinks they are the best thing since sliced bread.
by IncrediblyAwesomePerson January 13, 2014

by Aestheticgurl78 August 23, 2020

From the tv show Sam and Cat, lumpatious is used as an insult. Since Cat uses it, it is not a bad insult. It means to me to be a lumpy potato-like thing.
New Jeresy, don't be Lumpatious!
by Lumpatious_Is_A_Word_ February 8, 2015

by Koko Grande January 2, 2016

by Willydillydaphadilly January 22, 2017

by kk195056 February 29, 2016
