Damn straight! Nothing's lulzier than a terrible Mary-Sue. So anyway, here's a basic character outline that can be followed to help make your Sue:
(Picture of the Sue should be anime; a Naruto, Bleach, Deathnote re-color or anything off of Photobucket would be great)
Name (anything mythological, gemstone-related or after an animal is common, or misspellings of regular names like "Jaemie"):
Age (should be unreasonable for their occupation i.e. a 15 year old warrior):
Personality (moodswings fits VERY well):
Eye color (anything but brown, blue, and hazel, and can be subject to change):
Hair color (anything but brown/blonde/red):
Distinguishing features (sexily placed scars/birthmarks, tails, animal ears, etc.):
Outfit (should be something completely impractical for their job i.e. a blue tube top and go-go boots during a zombie invasion when they're a special ops agent):
Origin (being an orphan, having unreasonably cruel/abusive parents, running away, or being abducted is common):
Abilities (should be unreasonably amazing and most likely involving glowing, sparkles, animals or wings):
# of love interests (at least 3 is good, and one should go lesbian/gay for the Sue or turn good from evil):
Backstory (being an experiment, a hybrid of some sort, a prophet/chosen one, a runaway, seeking redemption/revenge from sort of shame would do nicely):
Life goal (to be the best at *insert title here*, to get revenge at *insert name here*, to fight for *insert faction/person here*):
Reedeeming/noteworthy characteristics (there should be NONE in this category):
So yeah, there's the basic skeleton. Remember, these are only symptoms of the disease, not the disease itself, although if a character tests positive for all these then there probably is a problem.