Jonah

n.

A person with whom bad luck is associated. A jinx.

In use

Yer some Jonah! Every time ye go to a match we feckin' loose.

Let Lawrence Muck translate it to posh English for you
Lawrence Muck

How simply wonderful to see you. Would you like me to translate 'Jonah' in use for you?

You are an absolute jinx! Every time you attend a match we lose.