Sis code 

A made up thing that doesn't exist, it is mocking the bro code and all those who follow the sis code do not deserve respect from anyone

Grace: Sry can't tell ya, sis code
Tyler: R u mocking the bro code

Sis code by @Yo bOi November 13, 2017

sis code 

A SET OF SIGNS INDICATING THE TIME FOR SEX BETWEEN AKINS AND DOLLY INVOLVING THE INTIMATE RELATIONSHIP AFTER HE BROKE THE BRO'S CODE BY SLEEPING WITH DOLLY (SIMEON'S GIRLFRIEND) BEHIND HIS FRIEND'S BACK, SIMEON.

ITS TIME FOR THE SIS CODE, BABE

sis code by geniphakay June 19, 2017