Flash loan using NFT as collateral?

I saw a post about this maybe a week or 2 ago, someone apparently put a BAYC ape up for collateral to get a loan. There were people arguing about whether it was a good idea or not. That is not the purpose of this post. I want to know where it can be done to look into it, the more Dapps the better, I like options.

Edit: I just meant loan, I used the term flash loan on accident.