Death by mushroom
A Dance with Dragons
Later on Illyrio serves Tyrion a dish of mushrooms kissed with garlic and bathed in butter. He tells Tyrion the taste is exquisite. Tyrion grows suspicious, thinking they are poisonous although in reality they are not. Illyrio uses Tyrion's suspicions to his advantage to convince him to travel to Daenerys Targaryen. Tyrion tells him he has no wish to die, but can't think of anything he has left to live for. Illyrio tells him he has "nothing", but they can change that. He then plucks a mushroom and eats it, declaring it delicious.
- Illyrio Mopatis, to Tyrion Lannister
Better a mushroom than a sword through your neck, is it not so? Why die with the taste of blood in your mouth when it could be butter and garlic? 
- Tyrion Lannister to Bronn, while he is lying incapacitated after the Battle of the Blackwater
My sister has mistaken me for a mushroom. She keeps me in the dark and feeds me shit.