Where is this from?

It's from an old flash animation with the titular title of Giggles The Slutty Clown from Hentai Foundry

Proof:
https://h-flash.com/giggles-the-slutty-clown/ (If you emulate Flash you can still use this)
http://www.hentai-foundry.com/pictures/user/Eggplants/181900/Giggles-slutty-clown

Here's a surviving video of it:
https://biguz.net/watch.php?id=1232118&name=sexy-clown-slut

It's from an old flash animation with the titular title of Giggles The Slutty Clown from Hentai Foundry

Proof:
https://h-flash.com/giggles-the-slutty-clown/ (If you emulate Flash you can still use this)
http://www.hentai-foundry.com/pictures/user/Eggplants/181900/Giggles-slutty-clown

Here's a surviving video of it:
https://biguz.net/watch.php?id=1232118&name=sexy-clown-slut