Dips are common to many partner dance styles (Tango, Lindy Hop, Salsa, Ballroom dances).
Characteristics of a dip include:
Some dance styles distinguish between sits, dips, and drops; as a general rule, the difference is the degree to which the base (usually the leader) ends up responsible for the mass and balance of the flyer (usually the follower). Where a distinction is made, it's usually a continuum from least to most responsibility, with sits being the least, drops the most, and dips in between.