Toy Story Toons: Partysaurus Rex is a 2012 American animated short film written and directed by Mark Walsh.

Potato Head's insult, he asserts that he is "Partysaurus Rex", plugs the drain, and turns on the water.

Finally, he pulls a small knob on the faucet and stops the flow from it, but this simply diverts the water to the showerhead.

He warns the others that the tub will overflow, but the bath toys think this is a good thing and gleefully ride the wave over the top.

"[4] A song inspired by the short, titled "Partysaurus Overflow" and produced by BT and Au5, was released as a digital download on November 19, 2012, on iTunes and Amazon.

It is also featured on the Pixar Short Films Collection, Volume 3 on Blu-ray and DVD, released on November 13, 2018.

Ben Kendrick, of The Christian Science Monitor, said that Partysaurus Rex is "easily the most enjoyable franchise spin off to date.