noun:
A story topper
verb/action:
To story top
To interrupt one's statement to describe his or her own past experience in attempt to "one up" you and make themselves feel more important or better than you
Friend: Damn man, I am so tired from yesterday's workout. Today is gonna... -
A Drew: -Oh yeah?! Well I did half of yesterday's workout at a much slower pace, and then I did 3 hours of wrestling practice! I am so dead!
Friend 2: Okay, Drew.