phrase meaning - What does it mean? "I can't people today"

There is a shirt with a sentence written on it. The sentence is :

I can't people today

What does it mean? I've seen this link and I know that "people" can be a verb but in this special case, I don't get the meaning of the phrase.

Answer

It's supposed to be funny.

It implies

I can't deal with people today.

I personally didn't find it funny because this structure

I can't [noun]

seems cliche to me.

It is supposed to invoke something like this

It's akin to

I can't even

if you are familiar with that expression.

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I felt like I should probably note that the structure (using nouns as verbs) can change meaning. It isn't fixed. But it is usually used to be funny. For example,

I can't math today.

It could mean I can't do/comprehend/tolerate/teach math, all depending on context.

Today, before I went to class, I saw this post. I was exhausted and I really didn't plan anything for class. So I was thinking, I can't math today. In other words, I can't teach math today. (I wasn't trying to be funny; that's how I felt. But it could be used by someone else to be funny, like if they really hated math.)

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Here is an instance of to [noun]. The speaker is talking about the abundance of tutorials in the game Pokemon LeafGreen

You get a tutorial battle where you are told how to play Pokemon. And then there is an old man later on who tells you how to Pokemon.

In this instance, we infer that "to Pokemon" means "to play [the game] Pokemon [LeafGreen]". He's trying to be funny/cutesy. He gets a couple of smiles, but no one really laughs out loud.