a German name for a decent, nice, if slightly 'ackward' kid that you'll discover when he becomes your locker buddy. He'll look you up in his old yearbook because he won't believe that you're not a new student. You, being his amazing locker buddy, will constantly beat him in the locker-opening challenges you'll frequently have. Be happy that you know a Matteo Zimmerman, because they're awesome.

a phrase chiefly used in northern England.

it is a contracted form of "it'll be reet", where "reet" means "alright" or "OK".

living your life according to "be reet" is the only way to find happiness in life.