Ice brain 

Another name for meth head

That creep is an ice brain

Ice brain by Operator36 March 9, 2023

Icebrain 

Someone who is stupid, or confused at every given moment.
.

Emma: Kait, you icebrain, your water is literally right behind you.

*Kait proceeds to look left, and is confused why she can't see her water.

Icebrain by Vulcan-A1 January 21, 2022