The basics
Lock-up
A set period after an IPO or acquisition when staff and early investors aren't allowed to sell their shares.
A plain-English explanation, not financial or tax advice. Rules and rates change, so check your own situation. For free, impartial guidance, try MoneyHelper. Disclaimer.
You'll hear it as
There's a six-month lock-up, so nobody can sell until spring.
Videos.
No video mentions Lock-up by name yet. These are on the same topic, Business & startups.