a mcmanpon can be many of the following:

1. One who drinks lots of beer and then tries to fight every one

2. One who gets overly wasted and then never succeeds in getting laid...every-time.

3. A person who every time they buy a pack of cigarettes they say it will be their last...yet they still buy another.

4. A person who always listens to his mother.

5. A guy that always demands the music to be overly loud.

6. A guy whose the best at everything.

7. A guy who would get back at his friends for something, but is too unambitious to do so..