terriblarious 

adj. a thing or idea which is both terrible and hilarious

1)Steve Irwin stingray humor
2)Dead baby jokes

"That joke was terrible! However, it was pretty hilarious. One might even say it's terriblarious."

terriblarious by ShinyBlackRoses September 21, 2006

Terriblearious 

1. Something so bad that it's hilarious.
2. Terribly hilarious.

1. Dude, we saw Buckcherry perform last night. It was terriblearious.
2. That new Dane Cook cd is terriblearious.

Terriblearious by Gagglin May 2, 2006

terrilarious

Terrifying yet hilarious. Like scunny, but more so.

A property common to US political leaders and their followers.

The Trump supporters became even more terrilarious when asked about wildlife crossing the Mexican border.

terrilarious by Mucus Membrain July 23, 2016