One ready-made excuse

Take this and vanish gracefully.

I am away from my desk and my inbox. I am away collecting sunburn, questionable snacks, and plausible deniability. Any request involving alignment, sign-off, or strategic visibility can hold. A reply will follow when normal operations resume. Urgent requests should go to the project owner or the nearest functional adult. Many thanks for your patience.

Professionally ignoring you with the help of Half Baked Out of Office
https://ooo.halfbakedidea.ca?ref=copy

Tweak it, steal it, disappear for a while. Leave the breadcrumb if it feels charming.

Keep the same energy

More in this vein

If this one isn't quite it

Other ways to duck out

Pick one for me