It's a game that I've played in a different forum, its quite fun actually. =)

Example:

Person 1: I drop some carrots
Person 2: *eats the carrots* I drop a CD
And so on...

I'll start.

I drop a tennis ball.

*Throws tennis ball for dog to fetch*

I drop a gallon of milk

*take the gallon of milk to the cheese making machine*
i drop a treasure map

*holds the map upside down and gets lost in the forest*

I drop a frying pan

I use it to make a grilled cheese sandwich
I drop a grilled cheese sandwich

I eat it.
I drop the moon.

Claims the moon as new territory
I drop a tray of lasagna.

It lands on my head, but it looks better than my current haircut so I just rock it.
I drop a big rock

accidentally hit my head against the big rock
i drop a small golden kitsune statue

I add it to my collection of objects.
I drop my viking helmet.

I pick up the viking helmet and go hunt some dragons! =P
I drop the box containing a radioactive super-spider inside

I See it falling and runs away screaming!
Drops hipster glasses

Throws the glasses in the middle of a hipster convention and watch as the chaos ensues.
I drop a tub of pop-corns.

I get smushed by an airplane
I drop a giant water balloon

i somehow inflate the action figure and use it as a boat
I drop a can of jumping bean

I ride the jumping beans like dolphins to saftey!
I drop a really big spunge!

removing water with the spunge

I drop an Ipad

*looks at it shattered on the floor* ...um... you should have waited for somone to drop a ipad case...
I drop a basket ball

I use the basket ball as a baseball
I drop a baseball bat (you can imagine what happened between that XD )

dodges the basketball flying at 80 mph but gets hit by the baseball bat

I drop a PS4

pick up the ps4 , wonder what it is , then keep it as a chew toy <3
i drop a magnet

*sticks a magnet on the fridge*

I drop a cardboard box

creates a stack of boxes that rises up to space. *climbs up the stack*

I drop a brick.

*Picks the brick and starts building a house* Need more!

I drop an icecube.

Slips from the ice cube.

I drop a box of pizza.

See what you did? There is pizza all over the floor. What a mess!
*calling tiger*

I drop an frog.

turn the frog into a prince by magic
i drop a metal detector

I use the metal detector to find a key to open a chest to get a screw driver to fix a flashlight to find a shovel to dig a hole to enter a cave to find a better metal detector to locate my house keys to go into my house so I could open the refrigerator to get my pickle jar to drop a pickle...
I drop a soggy Cuecumber!

I ignore the five second rule and eat the soggy cucumber
I drop Dogmeat (Fallout 3)

I stare at it.... I start drooling while still staring at it... Then I eat a hamburger from McDonalds.

I drop a collar bone.

I pick it up and place it back at your neck.

I drop the Enterprise.

I try to take off and crash into the closest building

I drop a microphone

I serenade the rest of the forum.
I drop a shoe

I turn into a dog and chew on it.

I drop a couch

I sleep on the couch.

I drop the MEGA-BALL!

I'm still a dog, so i bring it back to you to play fetch.

I drop a heaven cookie

I take it and feed it to the next puppy I can see.

I drop the empty Battery from my mouse.

I throw it back up (I hope that doesn't break the rules?)

I drop a sticky note