The Brief: PTR is an acronym for "pull to refresh."

DEEP DIVE
On apps with “pull to refresh” features, the acronym “PTR” directs people to pull down on the top of a page or profile to refresh it. The term is particularly popular on Clubhouse.
I love how thereโs still new acronyms on the internets.
Today I learned PTR => pull to refresh. Like in an app, you can PTR to load new content. Or in the case of Clubhouse, pull to refresh profile pics ๐
— Alex Silver (@silvr) February 12, 2021
Who knows, maybe you'll be the reason user guides will have to add a chapter on "PTR." Maybe you'll help @elonmusk teach the world about memes and #dogecoin. Maybe you'll even pause for this 1 tweet.
— The Best of Clubhouse โ๏ธ (@ClubhouseBest) February 8, 2021