Unfunny 

Lacking in humor.

See Amy Schumer.

Amy Schumer is unfunny.

Unfunny by The Matman April 19, 2017

unfunny 

A piece of garbage that is lauded by an entire generation, yet can't really make people laugh.

I Love Lucy is perhaps the most unfunny show that is mistakenly called funny in the history of television.

unfunny by XerxesTWD--BOOYAH! April 7, 2007

Unfunny 

Not fuckin funny bruh

My nigga really unfunny asdf

Unfunny by Tuhhhh June 15, 2019

Unfunny 

Someone like Lily Singh, King Bach, or Hannah Stocking who default to bad sex jokes, dumb faces/noises, or orange man bad jokes. Unfunny is a word that can apply to others who use this same humor, or it can be used to describe any bad meme, video, gif, etc.
The gif shown below is a gif of Lily Singh, the unfunny one listed above.

Person 1: Hey guys, that's what she said!!1!!!1!!! REEEEEEEEEEEEEEEE!!!!!! KONO DIO DA!!!! THUNDER CROSS SPLIT ATTACK!!!!
Every other rational being over the age of 2: Shut the fuck up you dumb unfunny piece of shit. I would like nothing more than to hear you scream after your head has been slammed into a waffle iron.

Unfunny by "Your-mom-gay"-smart_bebe June 16, 2021

Unfunny 

Someone who you just CANNOT relate to aka Lele Pons

Ugh Lele Pons is soo unfunny

Unfunny by Amiiiii April 5, 2019

Unfunny 

unfunny is a thing that is not funny...

person: Omg this urban dickonarty post was unfunny

fish: that pun was unfunny kys

Unfunny by Okgamerbro9001 May 27, 2018

unfunny 

Kids in the Hall, a sketch comedy (and I use the term "comedy" loosely here) by some no-name flapping heads.

Kids in the Hall is as unfunny as it gets; placing a close second is Dave Foley himself.

unfunny by Matt December 27, 2004