95dc162e_Glossary_of_Dance_Terms__m_Dance_Dictionary_from_Webref
Hook [Abbreviations] hk
Cross the free foot in front or in back of and near the supporting foot. Usually the hook does not involve a weight change—one will step during the following action (e.g., unwind), but a cue such as "forward, side, hook behind" might well intend a weight change during the "hook." This term can also be used to direct one partner (usually the woman) to wrap one foot or leg behind the foot or leg of her partner.
Glossary of Dance Terms
Description Glossary of Terms and Abbreviations from BallroomDancers.com Dance Dictionary from Webref