noun | furst moo·vr uhd·van·tuhj
First-mover advantage is like when you're the first one to discover a new meme format and you milk it for all it's worth before it gets played out - it's the advantage that a company or project gets by being the first to enter a new market or adopt a new technology. It's like being the first kid on the block with a new toy, but instead of a toy, it's a revolutionary technology that could change the world (or just make you rich).
Example
"Bitcoin has the ultimate first-mover advantage in the cryptocurrency space - it's like the Kleenex of crypto. Every other coin is just a cheap knockoff trying to catch up."
"Having first-mover advantage is like being the first one to find the hidden treasure in a video game - you get to hoard all the loot and laugh at the noobs who show up later and have to fight over the scraps. It's not fair, but hey, that's life in the fast lane of tech."