Quickie I didn't feel like making into a polished pic. No references (and no wings for Clump, apparently. Oops!)
Clump and Garble go way back, but when they get on each other's nerves they don't talk or hug it out. They bottle up their frustrations with each other and once they boil over a fight breaks out between the two. Being the higher ranking dragon and the one who tends to tease his friends less, Garble usually initiates the fight, typically after Clump failed to have any kind of filter one too many times.
They fight until they are tired. Once the frustration is out of their systems they help each other up and are best friends again. It's a peculiar sight to behold but everyone is used to it.