Idiom
get something under one's belt
Theme: UNDERSTANDING
to learn something well; to assimilate some information.I have to study tonight. I have to get a lot of algebra under my belt.Now that I have the Professor's theory under my belt, I can rest easy.
Idiom
get something under one's belt
Theme: EATING
to eat or drink something. (This means the food goes into one's stomach and is under one's belt.)I'd feel a lot better if I had a cool drink under my belt.Come in out of the cold and get a nice warm meal under your belt.