When somebody hears something and believes it to be fact even though it is just hearsay, and splits off into a new herd of sheeple.
Susan whispers to the new secretary Gina, "Here comes Jimmy. Don't give him any attention because he has 'Heard Mentality' and will go on and on if he thinks you believe him."
Jimmy "Hi Gina I'm Jimmy. Say, have you heard about the ____(conspiracy_of_the_day)____? This video is evidence it's true. You have to watch the whole thing though and they splain it all!. It's only 59 minutes long."
When you personally have made a repair to a machine and feel that it works better just because you worked on it. Even if the part of the machine you worked on would not make it work any better.
Jim: "I replaced the heater core in my car, now it seems faster..."
Sam: "I've heard of that before."
Jim: "Seems to run smoother too!?"
Sam: "That's Mental Horsepower!"
someone who’s only goal in life is to obtain more money and flex it everywhere
“ Yo look at this man flexinf his stuff on snapchat”
“ Yeah bro he was a brokeboi mentality “
some dumb white kid who thinks he's black
jeff:hey bob have you heard of that bitch woah Vickey?
bob: yeah shes mentally black!
jeff: yeah so fucking gay right!
The act of skipping either a event, such as school, or work, in order to clear your head, and de-stress from the overwhelming reality of life.
(also known as mental day off)
Guy #1: Dude, where were you in school today?
Guy #2: Oh, I was taking a mental day off from all that Calculus work.
Guy #1: I feel you, bro, I feel you....
A shorter way to say mental capacity, which means the capacity that your brain can take.
Me: Says a joke.
Jonathan: I don't get it.
Me: uh, is it beyond your mental capas to get the joke.
An adjective that describes something that is so retarded that you don't even know what to call it.
Thomas you are so mentally silly.