1. Sweep: A sweep is the name used for two categories of martial arts techniques. From standing, sweeps are throws or take downs that primarily use the legs to attack an opponent's legs. On the ground, sweeps are techniques for reversing grappling position.
2. Grapple: Grappling refers to techniques, maneuvers, and counters applied to an opponent in order to gain a physical advantage, such as improving their relative position or to escaping, submitting or injuring them, through the application of various Grappling techniques, and the counters to these. Grappling is a general term that covers techniques used in many disciplines, styles and martial arts that are practised both as combat sports and for self defence. Grappling does not include striking
3. Roll: Rolling is slang for Sparing in Brazilian Jiu Jitsu
4. Gi: This is your Jiu Jitsu Uniform- the jacket portion of the Gi is also referred to as a "Kimono". A Jiu Jitsu Gi is recognizable by its extremely durable construction. The exterior of the Kimono is rough to the touch, and the lapels are thick, and durable.
5. Belts: As in the majority of martial arts education all students start as white belts. Depending on the system you are studying under there may be varying levels or degrees. Progression goes as follows- White, Blue, Purple, Brown, Black. From my observation the time table for progression is not really defined. Some people earn a Blue Belt within a year, others take longer. This can be frustrating for people who need advancement for gratification in the study of the art form.
6. No Gi: this is Jiu jitsu without the traditional Gi or Kimono. Some consider this to be a more pure form of grappling as it does not allow for using your opponents uniform against them.