"Louis ck'ed" or rather just "ck'ed" is the act of masterbation in the audience of one or more people without having any or full consent to perform said act.
Man1: "I totally louis ck'ed this chick last night! She didn't know what was coming!"
Man2: "that's crazy! Was she down?"
Man1: "well she didn't really say yes but she didn't say no! That's for sure?"