It can be a technical term, but words are defined by their use. If you make a claim that one thing will lead to another, and someone says that's a slippery slope fallacy, what are the chances they will accept that it isn't a fallacy if you then elaborate on your reasoning for why one thing will lead to another? Basically zero, because what they meant wasn't to criticize your failure to provide reasoning, it was to dismiss your claim on the basis of its shape and to call you stupid. A failure to provide reasoning beyond implied reasoning isn't something most people see as a problem at all.

I think that if someone was arguing in good faith, instead of citing "slippery slope", they would instead ask why you believe one thing will lead to another.