EXAMPLE 1:
Dear Zora,
This is the last time I will remind you to wash the dishes after cooking.
We are roommates and we share a space. You never clean up after yourself! I always have to ask you to keep the apartment clean... Sometimes I feel like I am your mother! Seriously, if you don't shape up, I will ask you to leave.
Sincerely,
Tasha Orushko
EXAMPLE 2:
Dear Tasha,
I don't care what you say! I pay my rent on time and I always wash the dishes!
I am not your maid. I will clean up my mess, but don't expect me to pick up after you. Am I clear?
You are the one who has to shape up, my friend!
Have a great day!
Zora
MEANING: To shape up means to improve performance or behavior