What is I Suggest You Get Off My Roof Before I Ignite Your Frilly, Red Pants?
1.
A proclamation of annoyance and little or no tolerance for the disregard of property, mainly that of roofs.
<Yokel> Hey, Joe-Greg-Billy-John! I can see down yer chimney from up here! Hee-yuck!
<Grampa> I suggest you get off my roof before I ignite your frilly, red pants, Johnny-Smithy-Jeevesy-Beau!