What is the meaning of Byk?

chaff

wood dust, sawdust

worthless thing

bull (adult male of cattle)

bull (adult male of cattle)

stag (adult male deer)

howler (obvious mistake such as a spelling error or error in calculation, especially one made by an inept student)

a strong and rather large man

dirty laundry (clothes to be washed)

washing (of dirty laundry)

Source: wiktionary.org