It stands for "Child Rebel Soldier", the rap super group consisting of Lupe Fiasco, Kanye West and Pharrell Williams. Although still busy working on their personal albums, they still have one song called "Us Placers" which can be found in West's "Can't Tell Me Nothing" mixtape.
Compagnie Republique de Securite. French riot police. Mainly recruit in the countryside as most riots occur in the town, so they get the opportunity to wop, tear-gas and water-cannon townies.
The Parisianshippies were rioting again, so the CRS went and cracked some skulls.
Can't Roll for Shit: a gamer term denoting someone who frequently has bad dice rolls, especially at critical times. Originally used in role-playing games, where the consequence of bad rolls often means death for your character.
Many games require rolling dice to generate random numbers so that the results of an action are not foreseeable. Over time, results should be distributed fairly evenly, but someone suffering from CRS tends to have more than his fair share of unfavorable results. In games that are largely luck-driven, like Risk, no amount of good strategy can overcome CRS. In less-luck-oriented games, like Monopoly, good play can still sometimes overcome bad rolls.
"Man, I rolled another critical fumble! I got CRS today 'cause I can't roll for shit!"