Person from Oldham, Lancashire, coming from the expression 'Up yonder' pronounced as 'Up yonner' by people with an Oldham accent..as in 'Where are you from?' 'Up Yonner'
A person who utters "yoink" in conjunction with taking an object, immediately transfering ownership from the original owner to the person using the word regardless of previous property rights.
Sam logs onto Yoinker.com, types in ipod, and proceeds to yoink the iPod from the ebaylisting from the other bidders.