When a boy becomes more appealing to a girl simply because he is older than her, specifically if he is an upperclassman (junior or senior in high school). It seems many younger girls are drawn to older guys for this reason, even if he doesn't really have much else going for him. For girls, dating up is somewhat prestigious.
I suppose this could also apply in college, but I have not yet come across that scenario.
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug