You just gotta like, do the thing; you know?

A speech expression used commonly when someone is unable to remember the thing that they were supposed to do,
or when someone else forgot and you are using the phrase sarcastically.

Person 1: what were we supposed to do again?
Person 2: you just gotta like, do the thing; you know?

Just be doing stuff

When said person does something that seems out of character, in a random, and expected fashion, and to the public eye there is no obvious motive to said actions, so it seems like something out of the blue.

“Hey, did you see Kandi Burs parodied the Kylie Jenner cameo in the WAP music video?”

*laughs

“Omg Kandi just be doing stuff”

I was just about to do that

When someone who contributes nothing to the house wants to dissipate some guilt while trying to make the other person think more of them, while the listener just gets annoyed by how often it is said without action behind it

"are you doing the washing up? I was just about to do that."