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.
BLOGGER REVIEWI Smell Therefore I Am (25 Aug 2008)
It might surprise less seasoned connoisseurs just how similar Aramis 900 is to Aromatics Elixir. What surprises more than anything is how little difference there is between them. If they're brother/sister fragrances, then their relationship is decidedly incestuous.
It goes some way toward indicating how conditioned we are to segregate fragrances down a gender divide. Once the marketers have assured us enough that one can be safely worn by women and the other by men, we separate them in our minds, convincing ourselves the distinctions remain safely in place.