I'm studying social sciences.

I'm studying economics.

I'm studying biology.

I'm studying medicine.

I'm studying engineering.

I'm studying informatics.

Stuff and nonsense

to stuff one’s face

to stuff someone

He is a stuffed shirt

to be a stuffed shirt

stuffed shirt

I’m stuffed to the eyeballs

stumbling block

stump speeches

to be up a stump

to stump it

to stump up

to be stumped by a problem

to be stumped for an answer

to be stumped

as if stung by an adder

to be stung by insults

to be stupid enough to do something

Stupid is as stupid does.