jätkä — meaning in English

English meaning

bloke noun (British, informal) A man, especially an ordinary or average one.
bro noun An informal word for "brother," used for a male sibling or close friend.
dude noun (informal) A man, especially a young man.
Fella name An informal word for a man or fellow, occasionally used as a nickname.
homeboy noun A close male friend, especially one from the same neighborhood or hometown.
hook noun A curved piece of metal or other material used to catch, hold, or hang something.
jack noun A mechanical device used to lift something heavy off the ground, especially to raise a car to change a tire.
knave noun A dishonest or deceitful man.

jätkä is used for these senses in English:

bloke (UK, Ireland, Commonwealth, informal) A fellow, a man; especially an ordinary man, a man on the street. [From 1847]
dude (chiefly, US, Canada, colloquial) A man, generally a younger man.
dude (colloquial, used in the vocative) A term of address for someone, typically a man, particularly when cautioning them or offering advice.
fella (Australian Aboriginal) Used as a general intensifier; a pfella.
homeboy (AAVE, slang) he or him
hook (card games, slang) A jack (the playing card).
jack (countable, now, chiefly, US) A man, a fellow; a typical man; men in general. [from 16th c.]
knave (cards) A playing card marked with the figure of a servant or a soldier.

noun An informal word for "brother," used for a male sibling or close friend.
noun A young man associated with fraternity or gym culture, often used slightly mockingly.