To round a number to an absurdly low number of significant figures for seemingly no reason. This term is derived from the name of the author of several High School physics textbooks in New Zealand; Chris Rutter, who seems to have rounded numbers up, down or sideways depending on the mood that he was in while writing the answers sections of the textbooks.
347,389 Newtons = 347,000 Newtons = 300,000 Newtons.
"Oh my god that's ruttyrounding"
Short form of are you there. As in aRe yoU There??
Often used in instant messaging, like MSN, after you've double or triple sent your friend and they haven't replied back yet.
1.
Sam: Hey whuts up?
Sam:Wanna hang out friday theres this great movies coming out.
Sam: Oh ya Josh'll be there.
Sam: rut???
Jenelle: Oh ya im here, sure sounds great.