The mimics metal stems frost over and is cooler to the touch, but is otherwise fine.

I feed the mimic a ghost pepper

The mimic rewards you with a hot blast of flames. Toasty.

I feed the mimic another mimic

the mimic grows a bunch of conjoined mimic twins. it spits up a ring of blur and rob of illusions.

I feed the mimic a bunch of Initial D soundtracks and toys.

The mimic pops out a set of wheels on its sides.

I feed the mimic a bag of devouring.

The mimic is eaten, but a new mimic comes in its place. The mimic spits out some saliva.

I feed the mimic a potion of flying.

The mimic is eaten, but a new mimic comes in its place. The mimic spits out some saliva.

I feed the mimic a potion of flying.

The mimic sprouts wings and flies away. I guess the lack of posters made it lonely. As there is no more mimic, it seems the current game is over. Shall we begin again?

If yes: a secret door slides open revealing a new and very hungry mimic, eager to see what you can offer it. I give the newly arrived mimic a book of mad libs.

If no: go home, you're boring.

I think most people are home when they're here.

The mimic begins to (verb) (adverb) (number) (pronoun). It spits out a(n) (article of clothing).

I feed the mimic a(n) (adjective) (noun).

The mimic begins to froth gently 9 she? It spits out a sock. 

I feed the mimic a confusing mad libs format. 

The mimic spits out a scroll of confusion and uses it on you. 

I feed the mimic two exquisitely crafted masterwork handaxes. 

The mimic spits out its tongue. Next time it will remember to not let people put sharp things in its mouth.

I feed the mimc the Player's Handbook (5e)

The mimic spits out the Sword Coast Adventurer's Guide. 

I feed the mimic its tongue. 

The mimic is extremely grateful and spits out a harbor moon (worth 50 gp within Waterdeep and 30 gp elsewhere).

I feed the mimic a piece of bacon, so crisp it is almost burnt.

The mimic spits out a cone of cold. 

I feed the mimic a ghost pepper and stand back. 

The mimic spits out a fireball, but you don't have enough time to step a safe distance away.

I feed the mimic some milk.

The mimc spits out some lemons. 

I make an Intelligence check to make lemonade from the lemons, and roll a 16. I feed the mimic the lemonade.

The mimic spits out lemon sorbet. 

I feed the mimic some limeade. 

The mimic spits out a coupon for 15% off on all deals made with Asmodeus, Lord of the Nine Hells.

I feed the mimc a blue dragon egg.

The mimic spits out an ancient blue dragon. 

I feed the mimic the dragon. 

The mimic's mouth expands to fit the dragon in it's mouth, then spits out the dragon's skull.

I feed Matthias to the mimic.