Thundercats was an American animated television series developed by Rankin/Bass. It aired 1985-1990 & then had a run on cable television's Cartoon Network 1997-2002. Thundercats were a race of cat-like humans, each named according to what type of cat it represented: Liono was lion-like, Cheetarah was cheetah-like, Pumara was puma-like, etc... They were from a planet called "Thundera" which was destroyed. Only a handfull of their race survived & travelled to a new planet they called "New Thundera", but it was also sparsely populated by half animal, half man creatures such as beastman, monkeyman, hyenaman, etc... The thundercats arch nemesis however, was an evil humanoid mummy called "Mum-ra". Their catch-phrase was "Thundercats, HO!"
As in: "Remember that Thundercats cartoon from the 80's? I thought it was pretty cool back then."