To challange someone to a fight in the cbs PRIMARY (Green Street (yes it's actually called that) Wexford Town) - most usually or pacifically (specifically) in "Harvey's" field - the old soccer pitch across the road from the school. Before the traffic warden was introduced der (there) might be a few "boxes trowan (thrown)" on the pavement outside the school before the fight proper - like!
Said in response to someone saying thanks. Comes from a Joke where David Hasslehoff asks a Clerk to change his name to the Hoff... when the Clerk said Sure, No Hassle. Now instead of saying "No Hassle" people just say Hoff.