A crease in your stomach that develops from sitting down at the computer constantly
"Paul is hot and sexy, but he has a major nerd line"
The inescapable general baseline knowledge of fandoms even if you are not technically a part of the fandom, that you gained from being a nerd and talking to other nerds.
Person 1: How did you know so much about Doctor Who?
Person 2: Oh that, I got it from Base Line Nerd Osmosis with my sister.
3👍 1👎
The crease line that some people iron down the middle of each leg on their pants instead of ironing them where the seam is.
Check out Jensen's nerd lines.