Basically a more modern equivalent of the word 'psychedelic'. Describes anything that has a hallucinogenic or surreal quality. The word 'Acidious' itself refers to acid, the slang/street name of LSD.
Dude 1: Whoa, check out the patterns on that girls top...
Dude 2: How acidious...
Dude 1: Amen brother.
Dude 2: How acidious...
Dude 1: Amen brother.
by Firelovesugar April 20, 2009

by Jack Roberts September 03, 2005

That slip N' slide was way too acidis, my dive into the watery obis became to acidis for me to handle!
by Joey Shomagan January 22, 2011

"Ugh I have that Acidy feeling again it's horrid!"
OR
"Yeah it's like an Acidy feeling in my throat Dr..."
OR
"Yeah it's like an Acidy feeling in my throat Dr..."
by Queen Noodle October 03, 2017
