To shoehorn something means to force it into a small space or a tight situation, like when you try to fit too many things into a small bag.
Shoehorning something can make people think of being uncomfortable or trying to make something fit when it doesn't really fit.
Examples:
I had to shoehorn all my clothes into my suitcase.
She shoehorned herself into the crowded room.
He shoehorned the big box into the small car.
I tried to shoehorn my big dog into my tiny backpack!
The clown shoehorned himself into the tiny car.
I shoehorned all my toys into the small box.