1. A four sided die (d4) popular in role-playing games like Dungeons & Dragons.
"Ouch, Tom. Put your caltrop back into your dice bag..."
by Jake February 06, 2005
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A metal ball that has 4 spikes arranged like the corners of a tetrahedron. Used for slowing calvalry. (The spikes stab into the horses hooves) I almost looks like a playing jack.
Sam layed the caltrops accross the roads and all the horses who ran through the road couldn't run anymore.
by Switch_lordoftheferrets February 15, 2004
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A practical joke involving twisting a staple into a 3D triangluar shape so that when thrown on the ground, a pointy part will always stick up. Can be thrown into the back of peoples' shoes when they are leaning forward and distracted. Will produce a sharp pain in the inflicted and much anger towards the inflicter.
J: caltrops, caltrops, CALTROP!
P: fuck guy, the staples are stuck in my foot!
by Young Reezie January 29, 2008
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Emotional stress that causes

an illusion of physical pain, the pain could be possibly described as gravel scraping the inside of your chest or having sharp stones in your rib cage.
That devastating event left me with emotional caltrops... it hurts.
by SkyTheFloof July 15, 2021
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