1 definition by frisbeeisforchumps
A scrawny kid with a huge wang. A Magnum usually plays pansy "sports" like ultimate frisbee and bowling. Don't expect to see a Magnum out around the town at night because they usually go to bed at 10pm. This is because they are so tired from having to lug that huge mangina around all day. Even though Magnum's have large love sticks they usually strike out with the ladies, coming off as cocky and annoying. The cockiness usually develops from their knowledge that they are more "man" than the average joe.
by frisbeeisforchumps October 28, 2009