Chuck Norris Sweat is an incredibly powerful substance that can only be obtained when Chuck Norris roundhouse kicks another ultimate life form. When consumed, this powerful substance makes you grow a moustache, get HUGE biceps and grants you temporary invincibility, so it's basically a better Starman.
It was originally going to be Chuck Norris tears, except Chuck Norris never cries, plus that already exists. It was created originally in the Norris Cena Universe which is an alternate dimension Chuck Norris created to fight an epic duel with John Cena. There is John Cena sweat, but it is nowhere near as potent as Chuck Norris sweat. It is told throughout legend that combining Chuck Norris Sweat with John Cena sweat will create a force so powerful, there will be a moustache etched throughout time, space and the multiverse, not to mention the strongest material in the Multiverse.