What is the meaning of Kuk?

ISO 639-3 language code for Kepo'.

coconut

sorrow, mourning

water

alternative form of kukk (“penis; a contemptible, unpleasant, or foolish person”)

penis; dick, cock, prick

nail

claw

squirrel

heel

alone

ergative indefinite of ku

hip

a dick, a cock (penis)

fuck!

cook

Source: wiktionary.org