Sorry I didn't get back to you earlier, I spent my afternoon working at a local food pantry.

Same to you, buddy. At least the grandparent contributed a joke.

I'd be mocking if I said: "that is some serious bleeding edge comment right there". I applaud your sense of humour, though.

Actually it doesn't have to involve imitation to be mocking.

True, that is one sense (like in "mocking bird")...but it can also be just general derision or taunting, like in " The jelly donut sat there, mocking me."

/language nerd