(nautical, UK) To tighten up a sailboat's sheets in order to prevent luffing.
No comments yet — say something.
(informal, transitive) To become or make (something, someone) hard, either literally or figuratively.
No comments yet — say something.
Add your own interpretation of "harden up".
The vocabulary of software engineers, AI researchers, and anyone living in a terminal or on GitHub — from LLM to MCP, CORS to vibe coding, agentic to enshittification.
See all Tech, Dev & AI slang on Slangora.