Calling this a Halloween costume is an insult to the Optimus Prime spandex bodysuits that are sold to kids. It doesn’t disguise you in any way; it just makes you look like you’re having sex with Aqua Teen Hunger Force‘s sentient glob of hamburger, and doing so in a way that truly pleases him.
The costumes for the rest of the characters actually look like costumes. But wearable Meatwad gets the honeys, see.
If by “honeys” you mean “lunatics.”