What a Todd Share definition Flag Someone who is a extreme lightweight. Aka someone who can't handle any more than 2 standard drinks. Person 1 - Wow. That guy is such a lightweight. Person 2 - Yeah, what a Todd. What a Todd by Toddy23 November 28, 2014 0 0 Get merch Get the What a Todd mug. Buy Now — $32.95 See more merch