get the bit between your teeth

Meaning

1. to become very enthusiastic about sth that you have started to do so that you are unlikely to stop until you have finished

From the same entry

• be in bits
• the … bit
• bit by bit
• a bit much
• a bit of a
• a bit of all right
• a bit of rough
• a bit on the side
• bits and pieces
• do your bit
• every bit as good, bad
• not a bit