I just purchased a GP Super Decathlon kit. I have been reading threads on this plane. Tip stall is mentioned in regards to this plane and others. It is suggested that "washout" be added when building the kit. I know what that is, but WHAT IS TIP STALL? Is that when the wing loses lift with the tip losing lift last and thus the wing falls?

I am a beginner, this will be my first kit. I would appreciate your answers.

Thanks
Jim