A smell-a-like is a perfume that smells like a designer fragrance but with a different name and packaging, and at a cheaper price. A smell-a-like isn't an exact copy, but often smells very similar.
I have a bottle of perfume called New Look Night which is like Dolce Vita.
Not as good as the perfume it is based on and I prefer the original. Worth trying though and enjoying for its own sake.