Blaze a trail
Be the first person to do something.
In trouble
Do your part or share of the task.
Weed out
To be selective in removing what isn't wanted, is harmful or is not good enough.
Fuddy Duddy
Come down hard
Get a load of this!
Old fashioned.
Stay out of trouble-don't allow negative influence.
Take a good look or listen to this!
Strict punishment
Mum's the word
Pull your weight.
Long face
In hot water
Keep it a secret.
A sad or disappointed look on the face.
Keep on a straight and narrow path.