1.9+ Slimenado by furball_101

For those who wanted the Slimenado for Minecraft 1.9+

If you wish to "get rid of it" without it splitting into a million slimes, simply use this:

/tp @e[type=Slime] ~ -5 ~

NOTE: It tps all Slime into the void. 

If you have pet slimes (lol) or want to keep slimes (for sticky pistons or w/e) use this while standing within 10 blocks of it:

/execute @p ~ ~ ~ tp @e[type=Slime,r=10] ~ ~-5 ~