Ummm,
I did have one player make up a Gnome Fighter who specialized in 'inside jobs'.
Had special spiked adamantine armor made with acid invulnerabilty & whatever that DR 5/Bludgeoning is.
Actually, he had spiked everything. Helm, Gauntlets, Boots, Codpiece. If he could put a spike on it, he did so.
Then he got a Necklace of Adaptation & a Ring of Regeneration. And had several vials of Oil of Slipperiness fastened to his body.
When attacked, he would pratically throw himself down some poor creature's gullet. He'd be able to survive for a pretty long while, but the glass vials containing the Oil of Slipperiness wouldn't. When they broke, he's then be coated down with the stuff, then his 'internal assualt' or 'digestive tour' would begin.
No worse way for a dragon to die other than by a gnome resembling an adamantine porcupine speeding through its bowels at a pace Indy Drivers would be proud of.
No worse way for a gnome to die than 'expelled' from a dragon's backside at 1,000 ft.
No worse way for a orc chiefton to die than crushed by a poop covered gnome that fell from the sky.