Mr. Holbrook Share definition Flag A god of sex, often found with a yellow sweater vest. Well know for their monster-sized penis. Mr. Holbrook smiled and winked at us and we watched him and his amazing yellow sweater vest fly towards the sun. Mr. Holbrook by The Child Mole Esther April 15, 2008 0 0 Get merch Get the Mr. Holbrook mug. Buy Now — $32.95 See more merch