That is more than likely a team-specific term being used outside of its context. FYI, the only place where you will find the term <droplet> used, is in the public-facing AWS EC2 API documentation under InstanceTopology:networkNodeSet[^1]. Even that reference seems like a slip of the tongue, but the GP did mention working on the Nitro team, which makes sense when you look at the EC2 instance topology[^2].
[^1]: https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_I... [^2]: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/how-ec2-...