This is the literary version of "Sana all." It's when you say "You are my sunshine" instead of "You are *like* my sunshine." You're not just comparing, you're equating. It's a high-level compliment or insult, no 'parang' or 'tulad ng' to soften the blow. In short, it's direct to the point, like your friend telling you, "Bes, isa kang alamat."