failentologist 

some one who fails at almost every thing

rob: did you get my coffee?
tim:sorry i forgot...
a few hours later:
rob:so tim forgot my coffee this morning
jimmy: tim is such a fucking failentologist!

failentologist by why are muffins illegal? October 18, 2009

Faileontologist 

Studier of all things relating to failing, faileosis, and failuysms.

If it hadn't been for my friend being a faileontologist, I would never have known of my failurysm.

Faileontologist by Yars the Nazi October 11, 2009