Finisher:
1)The act of getting one last-blast before calling it a day.
2)A dedicated practice time after the bulk of the work has been done.
The art of the finisher:
#1)Blast through the 'main-course' of your workout.
#2)Pick a category of movement you did not address in the main-course (Weightlifting/Gymnastics/Monostructural activities). Or simply select a movement/pattern or two that were not expressed earlier.
#3)Recover from the main course and hit that shit hard!
Things not to do:
#1)Hold back on your main workout anticipating the finisher.
#2)Hammer the same movements that you just did in the workout.
#3)Over-reaching or creating a 2nd workout with your finisher. Making the finisher just a longer extension of the main workout isn't effective either.
Examples
#1)A few sets alternating of weighted back extensions and L-sits.
#2)A few sets alternating of Handstand holding and deadhang pullups.
#3)One set of one of the following: Max Pushups/Dips/Pistols/HSPU/Muscle-Up etc.
#4)On heavy days, a back-off set after your work sets with about 60-75% of your effort with flawless technique.
#5)One all-out 400m run, or two-all out 100m runs (one there, one back).
#6)Best box/broad jump.
#7) Farmers walks rope climbs
http://sanfranciscocrossfit.blogspot.com/2009/02/finishers.html