Read more: Fall Out Boy announce headlining tour
The clip sees Urie in a purple llama-like costume, eating chocolate chips from a bowl. Fall Out Boy's new song, “Young And Menace,” plays in the background.
The isn't the first time those fuzzy llama costumes have been posted on Fall Out Boy's Instagram.
And here's the clip with Urie:
So, what do you think this is all about? Tell us in the comments.
Watch more: Fall Out Boy discuss 30 years of influences