One ready-made excuse

Take this and vanish gracefully.

This is an automated reply confirming my temporary absence. I am on vacation and committed to disappointing my inbox. Quarterly urgency remains quarterly urgency without my narration. I will respond as soon as practical after I am back. For immediate needs, escalate through the normal chain before inventing a new one. I appreciate 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