A type of fuse used in pyrotechnics, the most common in fact. It is most commonly green altho it is availiable in many different colours and burnrates.
Man you better use at least 4" of VISCO on that big firecracker you making.
by Mephistos Minion April 08, 2005
dang, that girl is fly she is such a visco
by tiff March 05, 2005