This is the 12687th most frequent Russian word.
корочку
"Корочку" translates to "crust" or "small certificate/document" depending on context.
Here, "корочку" is used colloquially to refer to an identification card, such as a student ID card, emphasizing its small shape and importance.
Он показал охране свою студенческую корочку.
He showed his student ID to the security.
In this example, "корочку" refers to a small wooden item (coaster) used to protect the table from heat, showcasing its functional usage.
Не забудь положить деревянную корочку на стол под горячий чайник.
Don't forget to put the wooden coaster on the table under the hot kettle.
In this sentence, "корочку" refers to the crust of bread, which is a thin outer layer of bread that becomes hardened during baking.