Donly langwidge

n.

Heard in Tipperary

The only language or solution that will be understood.

In use

A dubble barrell, dats donly langwidge dim friggers understand, dare bould enuff if de get ya on yer own.

Posh English

A double-barrelled firearm, that is the singular and decisive course of action those dim-witted individuals understand; they are quite bold enough should they catch you on your own.