The River Liffey is a river that runs through the whole of Dublin City.

Scene from Mrs Brown's Boys D'Movie in the river Edit

Grandad is trying to go boating across the river when suddenly, Agnes and Dermot fall in. One of Buster's ninjas tries to rescue them but is unsuccessful and sinks the boat that Grandad is on instead. This shows that Grandad cannot swim well. Cathy, Buster, Winnie, Mark, Rory, Dino, Maria, Betty and Trevor try lowering a life buoy in to rescue the four but the villains cut off the bit of rope behind Trevor which tosses the whole party into the river.