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That nerdy greasy beast who sits behind you in science. With long hair glowing in the vibrant sunlight and biceps so firm, you just want to straddle him right in front of the whole class.

A Lyndon can also refer to a shy innocent orphan with a high potential to get laid.
Girl: omg that guy is such a Lyndon!
Teacher: I know (licky licky)
Girl: eww!
by ItsSummertimeMadness June 14, 2014