Temshirin
Midden - an idiot, or scammer
Eat your head off - get very angry
Dullard - Fool, Idiot
Kiendshier
Acting the maggot - Acting like a clown
Thanks a million - Very thankyou
Fair Play - something fair. Basically, reasonable, or "He's got a point."
Hallion - Idiot
Gobshite - Idiot
Cracking - good ex: He did a cracking job.