The phrase "when I dip" comes from the 1996 song "Da' Dip" by American hip hop artist Freak Nasty. In the song, "dip" refers to a dance move where one person puts their hand on another person's hip, and they move or "dip" together in rhythm. The lyrics emphasize a fun, flirtatious dance interaction with the repeated lines "When I dip, you dip, we dip," meaning when one person dips, the other follows, and they move together in sync. The song is about dancing and having a good time on the dance floor, with "dip" symbolizing a playful dance motion rather than anything negative or nasty. Freak Nasty's "Da' Dip" was a popular dance hit in the 1990s and inspired a dance craze. The hand-on- hip dip move described in the song is meant to be a simple, catchy gesture encouraging listeners to join in the dance and enjoy themselves.
In summary, "when I dip" in this context means initiating a dance move where the dancer dips their body while maintaining hand contact on their partner's hip, signifying a coordinated dance step.