Angry Larson Share definition Flag An Angry Larson is when you come home wasted and forcefully fuck your brother in the asshole. Man, he was trashed last night that he when home and angry larsoned his brother/ Angry Larson by caramelchocolate69 December 1, 2010 0 0 Get merch Get the Angry Larson mug. Buy Now — $32.95 See more merch