This is a term used in the place of the superstitious phrase "knock on wood" when one is traveling in a motor vehicle and no wood is around. One instead "knocks on car plastic" to affirm the superstition.
by Rellik Uzi September 9, 2010

by ashleywhaat? December 17, 2010

"Knock Your Clock" a saying used around friends for when someone is mad/angry at you. It usually means someone is trying to punch you or start a fight.
by Packers2003 May 16, 2017

Basically means stop fucking around with the shit that isn’t worth your time energy or effort it can refer to multiple things such as drug usage, casual sex, speed dating or otherwise anything that is meaningless and useless to one’s growth.
Tray:I just fell in love with a girl I’ve known for two minutes on discord!
Trophy:Knock it off with the bullshit tray.
Trophy:Knock it off with the bullshit tray.
by Ayo22445 November 18, 2022

by Kidcleft October 29, 2014

by tradesman June 15, 2004

"Honey, where did your cousin go to school?"
"Well according to his Facebook page he has Studied at the school of hard knocks"
"I'll put that in his obituary."
"Well according to his Facebook page he has Studied at the school of hard knocks"
"I'll put that in his obituary."
by greenhat99 October 23, 2020
