This is the 817th most frequent Finnish word.
jukka
"Jukka" is a Finnish male given name.
Here, 'Jukka' is used as a proper noun, referring to a person's name.
Jukka menee kouluun aamulla.
Jukka goes to school in the morning.
In this case, 'jukka' is short for 'jukkapalmu', referring to the Yucca plant.
Hänellä on hyvä jukka, joka auttaa aran paikan tullen.
He has a good jukkapalm that helps in difficult situations.
Here, 'jukka' is used colloquially to mean the leader or figurehead of the team.