What is the meaning of Jake?

Adequate; satisfactory; acceptable.

A juvenile male turkey.

police, a federal government officer.

A police officer, a cop (on foot, rather than in a patrol car).

Jamaica ginger.

A Discordian prank involving a large number of people sending bizarre letters or parcels to a targeted individual.

To play a Discordian prank on (somebody), involving a large number of people sending bizarre letters or parcels to that person.

Alternative form of jakke

broken ice, icefloe

Source: wiktionary.org