Going beserk and shooting a lot of people. term like "going postal". From the recent rash of school yard shootings.
When John lost his job he went 'schoolyard'
by Greatone May 29, 2007
1. A psychological condition characterized by a vigilant, sanctimonious, and solicitous predilection.
2. Rigorous in religious observance; marked by stern morality.
She's a schoolyard mother!
by Simon March 16, 2004
Seattle-area band, consisting of Ryann Donnelly (lead vocals), Jonah Bergman (bass, vocals), Steve Bonnell (guitar), Brian Turner (drums).
Their first CD, "The Funeral Sciences" was put out in 2003.
Awesome band, not like everything else!
"You should really check out Schoolyard Heroes!"
by SoMeOne March 24, 2005
Ryann. Jonah. Steve. Brian.

Oh yes they rock.

"I hate your fucking boyfriend"
I saw Schoolyard Heroes last night.
by Bill May 3, 2004
A much more superior term to emphasize bullshit. Only to be used when the bullshit perceived is higher than a normal call for the use of the word "bullshit." Can also be abbreviated, "Schoolyard," to invoke the emphasis on just exactly how ridiculous or out of line a certain situation is.
ex. 1 - Person is ditched for a steamy date. "Man that is some Schoolyard Bullshit!"

ex. 2 - Person playing Call of Duty is killed with a noobtube.
"Fuck!!! That is some Schoolyard!"

ex. 3 - Professor of general studies course gives you way more homework than any of your courses that actually pertain to your major.

Students Response - "This is some Schoolyard Bullshit!"
by Ghostbustersfreak March 25, 2010
A person at school who always stares at you, follows you around, try's to hang out with you, etc.
Ryan is a total "Schoolyard Stalker."
by KissMyAssYouFatWhore January 19, 2011