Gombeen

n.

Heard in Limerick, Kilkenny, Cork, Waterford, Cavan and Tipperary

A shady, grasping rogue or crooked speculator, often given to petty extortion and sharp practice.

In use

Don't buy a car off dat gombeen, he'd sell his own granny for a tenner!

Posh English

Do not purchase a motor vehicle from that bounder, as he would happily auction his own grandmother for a ten-shilling note!

Same phrase, other counties