What is a Slippery slope?

Short Answer:

In slippery slope a connection is made between the events in such a way as to establish that a particular action leads directly to the next there by making a chain reaction until the final result is achieved. 

Long Answer:

In slippery slope a connection is made between the events in such a way as to establish that a particular action leads directly to the next there by making a chain reaction until the final result is achieved. A slippery slope fallacy attempts to make a final event the inevitable outcome of an initial act. Example, You should never gamble. Once you start gambling you find it hard to stop. Soon you are spending all your money on gambling, and eventually you will turn to crime to support your earnings. People who can not come up with a good reason for why a particular change is bad use slippery slope. It may not be bad in and of itself, they say, but it will inevitably lead to things that are bad. A slippery slope argues that if we do A, then there is nothing to stop B fr om happening. If we do B, then C must surely follow. Obviously, results A, B, and C are undesirable. The fallacy is used as a reason for not doing A. The flaw is that there is usually no causal connection between A, B, and C. E.g.: If we pass laws against fully-automatic weapons, then it won't be long before we pass laws on all weapons, and then we will begin to restrict other right s, and finally we will end up living in a communist state. Thus, we should not ban fully-automatic weapons .

Here as it has been mentioned earlier that the action of passing fully automatic weapon is leading to the next pointing at it as the result of the first action which then leads to the next thereby creating a chain of reactions finally explaining the reason why we should not do the first action.