/klone/
n. 1. An exact duplicate:
"Our product is a clone of their product."
Implies a legal reimplementation from documentation or by reverse-engineering. Also connotes lower price.
2. A shoddy, spurious copy:
"Their product is a clone of our product."
3. A blatant ripoff, most likely violating copyright, patent, or trade secret protections:
"Your product is a clone of my product."
This use implies legal action is pending.