A type of person who annoys everyone. At a party, a Sambrook would be that "guy" that no one likes, communicates with, or even looks at. In a small group setting, a Sambrook would be the person who calculates (much to everyone's annoyance)the EXACT amount of money that everyone owes to the pizza delivery person, and whines and complains about having to pay an extra five cents. Seriously, a Sambrook is THAT guy.
"Scott...stop being a fucking Sambrook and pay the man for the fucking pizza already...and shut the fuck up..."
"Goddamnit Scott...no one cares that you skipped a year in grade school...stop being a fucking Sambrook at this party"