(someone) is a sponge

Translations
(кто-то) как губка
John is such a sponge, he always absorbs details quickly.
Джон как губка, он всегда быстро впитывает детали.
Definitions
This phrase means that someone absorbs or takes in a lot, often referring to knowledge, information, or sometimes resources. It can be used positively to describe a person who learns quickly and eagerly, or negatively to describe someone who takes advantage of others' generosity without giving back.
Words
someone

pronoun
кто-то
is

verb
является
a

article or possessive pronoun
неопределённый артикль
sponge

noun
губка