Tachyon
Fromn the Greek menaing fast, quick, swift etc
Particles that always move above the speed of light are named this
It is debatable whether they exist but we tend to not have words for things that dont exist [ above light speed speeds] or we dont experience like say warm snow, dry rain etc
EDIT should have typed at Tachyon speeds but then again I could have answered before you asked with a tachyon telephone
FWIW Einsteins theory holds that nothing that can travel below the speed of light [ us for example] can exceed it. It is non commital on whether things can exist above it in all states but it would break causality if it could.