An erection caused by intense intellectual thought. Came to inception due to its rhyming with the word/phrase "hard-on".
Bill got a raging smart-on when he realized all of the work that goes into the creation of a single pencil.
by TronsauseFiveMillion December 7, 2010
Get the smart-onmug. No matter what he/she said about thinking the guy was smart enough/good enough, it was evident that he/she didn't really think the guy was smart enough/good enough/qualified enough to figure a few things out.
by Solid Mantis March 31, 2020
Get the Smartmug. noun -- How the Japanese say "attractive" or "good looking". In order to say someone is smart, you would say "Smart head".
by GatsbyLosClavos August 22, 2008
Get the Smart figuremug. Possessing the creativity to solve any problem while using the minimum possible materials, cost, and regard for safety.
Bob didn't have a long enough ladder to get up on the roof of his house, so he lashed two ladders together with rope to make a long one. He's trailer smart.
by gee_ February 12, 2012
Get the trailer smartmug. by Flarkwad October 15, 2020
Get the National Smart People Daymug. 