you're only young once

Meaning

1. young people should enjoy themselves as much as possible, because they will have to work and worry later in their lives

In the movies · 1

• -You're only young once. -Oh, I’m old enough.The Curious Case of Benjamin Button2008

From the same entry

• the only thing is
• in name only
• one and only
• not only…
• only just
• only too
• only have eyes for eyes only for
• if only