Aplicado (en. Applied)
/apliˈkaðo/
Slang Meanings
In the school context, it refers to a 'nerd' or 'bookworm'.
He is always with books, he is a total diligent student.
Siempre está con libros, es un aplicado total.
Used mockingly to refer to someone who studies a lot and enjoys it.
Look at Pedro, always so diligent, he never leaves the library.
Mira a Pedro, siempre tan aplicado, nunca sale de la biblioteca.