I. noun
1. : a string of daisies with stems linked to form a chain ; specifically : such a chain carried by chosen students at a class day or other celebration in some women's colleges
2. : an interlinked series (as of events, items, or steps)
a daisy chain of middlemen — Christian Science Monitor
II. noun
: a group sexual activity in which each person attends to the one in front while being attended to by the one behind