The mimic chokes the ball and starts to play soccer with you.

It wins the game, and therefore, you get nothing in return.

I feed it a flute.

You get a violin.

I feed the mimic a dumpster.

you get a recycling bin

i feed the mimic a rainbow

It takes the rainbow with glee, devouring it. It does a weird sort of dance, and throws up the following

A +3 apricot

1 ep

and a tropical shirt that when worn, changes your race to a random creature permanantly, though it only works one time ever. You gain all stats of the creature, but keep your charisma, wisdom, and intelligence.

I offer the mimic a bag of ball bearings.

It greedily chows down the ball bearings, and burps out a flaming pile of orc bones and poop, dealing 10 fire and 10 psychic damage as you frantically try to get the sight and smell from out of your memories.

I shove the annoying rules lawyer into the mimic's mouth 

You now have no lawyer, and so the mimic arrests you.

I feed the mimic a gelatinous cube

You get a Large cube. The cube is invisible, and weighs 20 pounds.

I feed the mimic a giff.

It burps out a barrel of gunpowder with the fuse lit...

I feed the mimic some dogfood.

The mimic spits out a can opener.

I feed it a tuna fish pickle and barbecue sauce sandwich with extra cheddar.

it spits out some cheddar flavored goldfish, a pickle smothered in barbecue sauce, and two soggy slices of bread that smell like fish.

I feed the mimic a void kitten inside some nice taquitos being eaten by a buff fish on some fire on an ilithiad (do we mean ilithilid [mind flayer]?) that acts as his pet and sings Broadway musical soundtracks and speaks every language and is a level 30 bard college of glamour and is level 20 in every other class is able to cast meteor swarm and every power word at will and has + 400 in every skill and has advantage on initiative biting into some banananananananananananananananana! paint on a football that is attached to a stick that is infinitely collapsible and extendible stuck in a BLT that if you bite into it the bitten part regenerates in the hand of a lego ninja with a dragon inside of it that is real holding a [Tooltip Not Found] that has 15 wishes available and a spell gem with a wish inside in the hilt with the best friends of a luck dragon that’s also your friend and a ranger that doesn’t exist in an alternate universe watching the sky eating Wild Magic Sorcerers eating the Mind Flayer eating the commoner with the stats of a tarrasque eating a living pineapple sneaking out planets in the sky that is pink and has a pet black bear wearing a top hat that is being eaten by Grumpy Cat that is made of that tastes like potato chips being eaten by an angry Tiamat that dances with a mop that tastes like blueberries and eats dirt with a pheonix sticker on it that looks hot that smells of a freshly mowed lawn that always rolls a nat 20

The mimic throws up all over you and then eats you to feel better.

I feed it a dumb adventurer.

The mimic projectile vomits a banner that reads: Congrats on your new membership with dnd beyond! If you need help finding or figuring something out, feel free to pm me! - Lili Scheppen.

I feed the mimic mac and cheese.

The mimic spits out a flashlight. I feed the mimic a flaming bag of dog poo

 the mimic spits out a dog made of poo.

i feed the mimic the dungeon we are in.

It spits something out, but you wouldn't know what it was because you were in the dungeon it just ate.

I wish for Godhood

The mimic doesn't understand what is godhood so it spits out D_and_D_kitty who was in the dungeon it just ate. I feed the mimic a sword of flying

He spits it out and it flies right at you

I feed it a god

The god won't fit, but it was nice effort the mimic spits out a like. I feed it the hand that was cut off by the sword of flying.

I bites the hand you fed it AND the only other hand still attached to you. (it bit the hand that fed it.)

I feed it Daryll_Goodfellow's feet, as well.

Not only does the mimic eat the feet with which you fed it Daryll_Goodfellow pushes Kliff_the_Gelatinous_Cube with the stubs that are left from his arms, the mic is pleased and spits out a slimy cube. 

I feed the mimic a chipotle dish (any will do)