A tiktok way of saying "Autistic", in a manner of like, an autistic guy is calling another one autistic.
"Why did he do that? Is he acoustic?"
by SpanishPenguin November 6, 2023

a funny joke created on the internet. basically asking someone who is visually mentally challenged or someone who MAY be mentally challenged if they’re mentally challenged without asking them
by bigbootyhoessssssssss November 13, 2023

The art of being acoustical
Dude did you see that guys acousticalness? It was huge!!
or
I wish I had more acousticalness in this music, it'd sound so much better
or
I wish I had more acousticalness in this music, it'd sound so much better
by Isaac500 March 30, 2010

guy 1 showing obvious signs of autism
guy 2: hey guy 3 what's up with guy 1s problem
guy 3: oh hes acoustic
guy 2 understanding that guy one has autism
guy 2: hey guy 3 what's up with guy 1s problem
guy 3: oh hes acoustic
guy 2 understanding that guy one has autism
by yourfriendlynighborhooddiction June 13, 2024

The meaning of "acoustic" in slang is another way of saying autistic, without actually saying the word. So when someone asks if a person is "acoustic" they're asked if that person is autistic. Or if someone says "You're so acoustic" they mean "You're so autistic/weird" Or in other words, sped.
by anonymous April 16, 2024
