On Cybertron, Prowl was often considered "fat" or "chubby." Why? Because he weighed more than others. It was like how the guards on Velocitron called Blurr fat because he weighed more than them.

You remember seeing people make jokes about him or call him fat, things like, "hey, at least you're better than Prowl, right?" or "you're gettin' too heavy to drag through enemy compounds" and "Prowl, you've put on weight." Or, even worse, Jazz telling Prowl that he needs to lay off the Energon.

You haven't even known Prowl for that long, but even in the small amount of time you have known him, you find that he frequently gets asked out as a joke. You felt a little bad.

That's an understatement. You felt really bad for him. Which was probably why you were still friends with him.

Your patience with Prowl was running on empty, but you had too much of a spark to stop being friends. Besides, he was good at his job and so were you---that's why he got along with you so well.

You weren't insufferable, and you did your job.