face like a slapped arse - When your face turns red like a tomato because you're so emb

When your face turns red like a tomato because you're so embarrassed or shy, especially if you're from Scotland.

I tripped in front of my class and my face was like a slapped arse.

I said the wrong thing in a group project and my face was like a slapped arse.

I got caught eating candy in class and my face was like a slapped arse.