stupid, stooped

Stupid or stupid means unintelligent, slow-witted, dull, or senseless--
You're not stupid, you just need to learn to think before you speak.
This is such a stupid movie!

Stooped or stooped is the past tense ( yesterday, or some time ago ) of "stoop", meaning to bend over, or to bend forward and down--
I must have dropped my wallet when I stooped to pick up my keys.
He nearly fell over when he stooped to pick up the package on the step.

Stooped or stooped may also describe someone who is bent over, or  bent forward and down--
They saw an old man, stooped from age, and stopped to ask if he needed help.

Now that you know that, you can say--
"I stooped to pick up a penny and dropped my purse. How stupid of me!"