To talk all around the houses when asked a very simple and direct question.
I asked Yak if he cleared his diary, but instead of answering with one simple answer, he answered all round the houses, fifteen minutes later we got the answer. Yak is a Yak
A semi-uncommon noun used in place of penis
Dom: Do you see Hannah over there?
Sam: Yeah she is sucking Colin's YAK.
A word which can be used as a synonym for the words 'to spit on'. Similar to Delling, it is unknown how the word came to pass, though it is thought that it also came into existence in the boy's common rooms. In the past tense it takes the form of "yaked".
"Gonna have to perform a yak attack"
"Hey did you see how that guy got yaked on?"
" Josh do you have to piss in the bins and yak on the floor?!"