not be all fun and games
US /nɑt bi ɔl fʌn ænd ɡeɪmz/
UK /nɑt bi ɔl fʌn ænd ɡeɪmz/
1.
to be serious and difficult, rather than enjoyable
:
•
Being a parent is not all fun and games; it requires a lot of responsibility.
•
Working in a startup might seem exciting, but it's not all fun and games.