What is the name of the most massive irregular satellite of Saturn?

Our loveable space case Phoebe, from Friends, tends to be irregular. Hence my choice.

Tom, "Irregular" satellites (moons) have (a) elliptical and (b) inclined orbits -- unlike regular satellites, which follow a circular path around the planet's equator. There can be other differences, but those are the defining ones.

"something is wrong with the left phalange"

Filip is a Hoot!

Hilarious choices, my Friends!

Tom, you didn’t finish reading.

What is irregular about it? I thought it might mean not spherical, but the information says it is spherical. Did I misread something?