What does YUK stand for?

Youth Uncovering Krud - Antipollution organization in Schenectady, New York

Yuki - Language code (ETLW)

Yukon (automobile) - NCIC car model code

Yukon Inflatables USA - NCIC boat manufacturer code (NCIC)

Yuzhno-Kurilsk - Former USSR - Seismograph station code, US Geological Survey (SEIS)