Goa'uld term for "I will die free." The phrase seems to be a variant expression identical in meaning to "dal shakka mel." It is used by the Jaffa resistance as a greeting of identification and a statement of blunt defiance to the Goa'uld.
The word "kek" means "die."
Birthright - Upon meeting the Free Jaffa Ryk'l, Teal'c returns his greeting of "Shal'kek nem'ron" with "I too will die free, brother."
Citizen Joe - Civilian Joe Spencer greets Teal'c with "shal'kek nem'ron" upon meeting him at Stargate Command.