swim the Forth

Variant of swim the Tiber, by substitution of central Scotland’s river Forth for Rome’s river Tiber.

swim the Forth (third-person singular simple present swims the Forth, present participle swimming the Forth, simple past swam the Forth, past participle swum the Forth)

1. (intransitive) To convert to Presbyterianism.

• swim the Bosphorus (“convert to Eastern Orthodoxy”)
• swim the Rhine (“convert to Lutheranism”)
• swim the Thames (“convert to Anglicanism”)
• swim the Tiber (“convert to Roman Catholicism”)