Coddin

n.

Heard in Galway, Waterford, Kilkenny, Offaly, Sligo and Wexford

To engage in playful deception, pulling someone's leg, or talking absolute nonsense.

In use

Are you coddin me with that price for a bag of chips la?

Posh English

Are you having me on with that exorbitant tariff for a parcel of potatoes, my good man?

Same phrase, other counties