Gombeen

n.

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

A foolish, dodgy, or grasping person; a general rogue or eejit.

In use

Look at de state of yeh, yer some gombeen tryin' to flog dat knackered bicycle!

Posh English

Look at the state of you, you are a complete bounder attempting to hawk that broken-down velocipede.

Same phrase, other counties