Irish term which has several meanings usages. The meaning is fairly intuitive-
1)verb; ... wrecks my
head/...is wrecking my
head; something annoying or confusing.
2)Adjective: Headwrecking
3)noun; Headwrecker/wreck-the-
head: an extremely annoying person.
1) This maths is wreckin my
head.../that fuckin crazy frog ringtone wrecks my
head!
2) calculus is headwreckin!(it's not generaly used in any other context, like "headwrecking calculus")
3) That Lorna is a headwrecker/wreck-the-
head knobjockey.