[liquidswords]

I could have swore this used to be a feature on Twitter years back and they took it out. Am I crazy?

[blackphace]

You're not. There was a little button on profile pages that did exactly this. I remember them removing it in a hurry when people took notice.

[chatmasta]

You might be thinking of a similar hack someone made for Instagram. Instagram ended up shutting it down.

[rilut]

I remember this was a feature in TweetDeck, so you can pin a column of this