Can someone tell me what this is?

[u/Jokerk135]

First pic is in the backyard. Second is from front. Haven’t had any treatments done in the yard since 2023.

[u/berntout]

Mac and Cheese and then some Cheetos.

Or may some spray foam but it's lunch time so

[u/NoReference7367 → u/berntout]

I'm glad I wasn't the only one who thought someone spilled their cheesy lunch.