you need to take it out and either empty it or replace it. The phrase means that there is a unit, a "bottle" that collects the toner waste that is produced while printing and copying. Well, that thing is full and cannot take any more, so if you want the printer/copier to work properly, you need to give the machine an empty receptacle for the waste.
Paper waste basket is full. What to do now, then? Well, most of us would empty it. I just don't know if the bottle is supposed to be tossed and replaced, or simply emptied. Toner is a powder that is a mess to work with, so I suspect tossed and replaced, but the manual would tell you.