A dude who usually acts like he's above everyone, sometimes referred to as a douchebag, asshole, or prick.
Person 1: Have you heard about how Tyler's been acting?
Person 2: Are you talking about Mr.Self-Important?
Person 1: Yeah, what a tool.
Person 2: Are you talking about Mr.Self-Important?
Person 1: Yeah, what a tool.
by SunnyFromOMORI September 17, 2023
Get the Toolmug. 
A person with a super inflated ego and mods a leased vehicle. Specifically a Honda Accord and then tries to sell it on the used car market without clear title.
Mark is such a tool did you hear his latest idea of selling his modified leased vehicle without actually owning the car? He even went so far to walk into a CarMax and the salesperson told him he can't do that. What a fucking tool LOL!!!!
by chinoloco23 February 16, 2022
Get the toolmug. When you shoot a firearm of any kind spray-and-pray style and miss every shot. Often due to the fact that semen is usually shot out sloppily.
by TrilliASF September 24, 2022
Get the Jizzy with the toolmug. by Whynot485 July 4, 2017
Get the dotting toolmug. A tool is somebody who does way too much to try to fit in. So people use them, knowing that they will do anything to fit in, and pretend the tool will be liked if he/she follows through. Typically, a tool is too dumb to notice this. Trying too hard to fit in is what causes them to not fit in, often making akward comments or just annoying the shit out of everybody they're trying to hang out with.
Casey: *laughing* I just told Steve he could drive us to the party if he did my math and chem homework...
John: Wow, seriously, what a tool
John: Wow, seriously, what a tool
by 0gi3 February 23, 2009
Get the toolmug. 