mdo is a suffix meaning "my dick off." It is used by appending the first letter of a gerund in order to create an acronym that signifies one is going all out to complete a task. It works on the basis of hyperbole by stating that one is working so hard on something that it somehow causes their dick to fall off.
Possible uses could include:
wmdo = writing my dick off
pmdo = presenting my dick off/proofreading my dick off/partying my dick off
amdo = animating my dick off
smdo = sleeping my dick off
...With infinite possibilities
wmdo = writing my dick off
pmdo = presenting my dick off/proofreading my dick off/partying my dick off
amdo = animating my dick off
smdo = sleeping my dick off
...With infinite possibilities
by Friar Sloth November 06, 2010