Chinese word search
Another word for an erection. This is a measure of hardness of the boner. On the grounds that a Chinese word search is pretty damn hard, then if you are as hard as one then you have a very fine erection.
Dude 1: "Whoa man! Did you see that chick's hooters?"
Dude 2: "No shit! I'm hard as a Chinese word search!"
Dude 2: "No shit! I'm hard as a Chinese word search!"