M
20. ME: maximal effort. Go all out for the time or reps prescribed.
21. MetCon: short for metabolic conditioning, a type of short, high-intensity workout, designed to improve your cardiovascular capacity and rev your metabolism
22. MP: military press
23. MU: muscle-up (This is one of the most difficult upper-body exercises. Here's How to Do a Muscle-up.)
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O
24. OHS: overhead squat
P
25. Paleo: a diet based on the theory that humans should eat the foods available to them in nature. It's based on Dr. Loren Cordain's book "The Paleo Diet."
26. PC: power clean
27. Pood (PD): unit of weight measurement for the kettlebell. One pood equals 35 pounds.
28. PP: push press
29. PR: personal record
30. PSN: power snatch
31. PU: pull-up or push-up
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32. Pukie: an unofficial CrossFit mascot. Pukie is a cartoon drawing of a clown throwing up after a tough workout—which is seen as a badge of honor in some CrossFit communities.
R
33. Rx: as prescribed. Don't change any weight or reps during a workout.
S
34. SN: snatch
35. SQ: squat
T
36. TGU: Turkish getup, a total-body exercise. (Learn how to perform the movement with the 7 Secrets to the Turkish Getup.)
37. T2B: toes to bar, a core exercise. Hang at arm's length from a pullup bar and raise your toes to touch the bar.
U
38. Uncle Rhabdo: a controversial, unofficial CrossFit mascot representing the concept of "no pain, no gain" to the extreme. The condition, rhabdomyolysis (rhabdo) can occur when the muscles work so hard that individual fibers break down, releasing proteins into the blood stream. In extreme cases, it can lead to kidney damage or even failure.
W
39. WOD: workout of the day. A box's coach may create his or her own WOD or there's an official WOD published on CrossFit.com daily.
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