I know I say, "My brain is being dumb," or, "I am having a case of the braindumbs," when I am having Fun Anxiety Times. I tend to refer to autism things more as "my brainstuff" since it is kinda my brain but it's more the way my brain is rather than my brain being an anxious piece of shit who needs to quit it. I mean autism sucks sometimes and I get angry at my brain for being the way it is on occasion, but like @Acey said, it's a part of who I am so I can't be that angry at it because I would probably be a totally different person without it (also I can do cool stuff like recognise patterns and notice details other people don't notice! That is a cool thing!) I think, in a way, maybe personifying my brain gives me something to attribute blame to. Like, it's not me that's having an anxious self-hate spiral that is causing me to be unable to get out of bed, it's my stupid brain! Damn you, brain! Or, "Goddammit brain, get your executive functioning together, we have shit that we gotta do." Does that make sense?