cracksoff
verbUK /ˈkræks ɒf/
US /ˈkræks ɔf/
To break a small piece off something with a snap.
She cracks off a piece of chocolate to share with her friend.
OTHER MEANINGS
2. To say something funny suddenly and loudly.
He cracks off a joke that makes everyone laugh.
3. To start doing something quickly and with energy.
The runners crack off at the sound of the whistle.
4. To fire a gun or make a sharp loud noise.
The old engine cracks off a few times before it starts.