Pronounced "Chuckie ar la". The word or saying is rejected and hated by protestants, police officers, orange men and British army personell. Used freely in Ireland as a joke as well. Also Tiochfaidh or chuckie is referred to as a Provo, an IRA man or supporter.
Irish man: "fuck off you British cunt, Tiochfaidh ar la and up the IRA".
Person 1: "hey do you wanna go for a beer in the Shamrock bar"
Person 2: Nah man too many 'chuckies' (Tiochfaidh's) drinkin there, lets go to the Blarney stone instead".
Person 1: "What, are you a brit, fuck off ya ballbag. Tiochfaidh ar la"