Things like "ItsFunnyTypingThis" or "StopReading" or "YouAreASillyTulip" just random sentences.
Also, sarcasm like "OhJoyI'mEcstatic" or "OfCourseYouCanNumbnuts" or "YeahRightYourNotAddicted"
Insults can be funny but nothing offensive."
Be creative.
People have weird user names so they can remember them and to be funny.
HoorayForPeePee is so funny
Cool unused usernames for Instagram 2015
Cool unused usernames for Instagram 2015
Good usernames for Tumblr should be unique and creative. Make a username that is an expression of who you are and your personality.
I see you've noticed their Webkinz! Unfortunately unless you know the Gosselins you cannot get their usernames.
One can get ideas for unique usernames to use on online forums from the following sources: Wiki How, Spinxo, Geek Zone, Name Generator, Buzzle, Cute Usernames.
urmom
sandyli123
Zyilz
butt999