pick up trou Share definition Flag To raise one's pants from ankle-level to waist, covering the nether regions; opposite of drop trou. My buddy dared me to drop trou in front of a group of school kids. It was really embarrassing when the police officer told me to pick up trou before I was arrested for sexual harassment. pick up trou by TrouDropper March 11, 2011 0 0 Get merch