A.k.a. “gaff tape,” “gaffer’s tape,” and more. Gaffer tape is tough, wide cloth tape with strong adhesive that is similar to common duct tape, except that the adhesive used for gaffer tape is synthetic (versus rubber-based on duct tape) and does not leave behind gummy residue when the tape is pulled up or removed. Gaffer tape is commonly used for temporarily securing cables to a stage or other surface, though it can be used for many other applications.
Gaffer tape gets its name from the film and television industries; in those worlds a “gaffer” is the head of the lighting or electrical department within the film crew. (The word “gaffer” has roots in 19th-century English, where it referred to an old man/grandfather/elder or a boss.)