Aria
What does this phrase mean? Pollo? Loco?

"Pollo" is Spanish for "chicken". The speaker here pronounces "pollo" incorrectly, it should be said like "poi-yo". "Loco" is Spanish for "crazy". Therefore, "pollo loco" means "crazy chicken". "Pollo" comes before "loco" because the word order in Spanish is often in reverse of English.