A series of tantrums, usually done by people called Jacob, that eventually become death threats. They even could involve threats such as "I will throw a book at you!" meaning, they will throw a knife at you.
STAY AWAY FROM JACOBISMS.
They call themselves "royalballpython01" STAY AWAY FROM HIM ON ROBLOX
STAY AWAY FROM JACOBISMS.
They call themselves "royalballpython01" STAY AWAY FROM HIM ON ROBLOX
He is having Jacobisms
by SciencePi May 6, 2020
Get the Jacobismsmug. An adjective pertaining to any Jacobly feature. Specifically a funny or goofy feature of a Jake/Jacob. Jacobness is the essence of Jacob, Jakes, and all Jakes and Jacobs to come. (ex: Jake Gyllenhaal, Jake Paul, Jacob Sartorius)
by eggmanlovestails July 9, 2018
Get the Jacobnessmug. Bringer of definitions.
by BLAM! November 5, 2004
Get the The Jacobmug. A psychotic, schizophrenic madman who has the largest intelligence of his time, with incredible anger issues and has a habit of nearly killing the people he knows, and every once and a while goes through with it, but also can be really nice to those who have not wronged him, and is incredibly unpredictable and spontaneous.
Guy: Jacob, you suck balls
Jacob: YOU FUCKING BITCH !
(loud squelching sounds)
Jacob: you deserved a worse death than that...
Jacob: YOU FUCKING BITCH !
(loud squelching sounds)
Jacob: you deserved a worse death than that...
by schizophremadness March 1, 2018
Get the Jacobmug. always gets his hair done and eats cat in the bathroom and eats ass in the lunchroom and has a boner
by iynez February 12, 2020
Get the Jacobmug. 
Get the Jacobmug. by somebody333 October 30, 2019
Get the jacobmug.