Slang for "It's just sheet metal"
*texting your buddy who's not offroading with you*
Person one: I just slid my truck into a tree and caved in the whole bedside on trail 69
Person two: IJSM. More damage means more character
Inserting your thumb into the asshole of your partner similar to how you stick your thumb into your jugular when the slap rounds I love a little bit too hot. Popularized by the popular YouTuber Kentucky ballistics
She getting the Kentucky plug Tonight!