Can you help me identify this plant?

[MistyFying]

Yep I would have said Agave... we have several in our garden too

[Tanya]

They are great in pots So if you don't want to dispose of it, throw it in a pot

[*Beema*]

Definitely Agave attenuata, they are very expensive to buy, especially at that size, they create little suckers/new plants, I recommend potting them up.

[~Kim~]

That's one very exxie plant you have growing there. It's beautiful.