Below you will find some of the common CrossFit abbreviations and jargon. If you can't find it here, a simple Google search will likely yield some clarification.
CROSSFIT ACRONYMS AND ABBREVIATIONS
AMRAP: As Many Reps (sometimes Rounds) as Possible.
Box: A CrossFit gym, or an object you jump on (when followed by "jumps").
BP: Bench Press.
BS: Back Squat.
BW: Body Weight.
C&J: Clean and Jerk.
DU: Double Under.
EMOM: Every minute on the minute.
FS: Front Squat.
GHD: Glute ham developer.
GHD Sit-up: Sit-up done on the GHD bench.
GPP: General physical preparedness.
HSPU: Hand stand push up.
KTE: Knees to Elbows.
Met-Con: Metabolic Conditioning workout
MU: Muscle Ups.
OHS: Overhead Squat.
PC: Power Clean
Pood: Weight measure for kettlebells.
PR: Personal Record.
PP: Push Press.
Rep: Repetition. One performance of an exercise.
Rx'd: As prescribed; as written. WOD done without any adjustments.
RM: Repetition maximum. Your 1RM is your max lift for one rep. Your 10 RM is the most you can lift 10 times.
SDHP: Sumo deadlift high pull.
Set: A number of repetitions. e.g., 3 sets of 10 reps, often seen as 3x10, means do 10 reps, rest, repeat, rest, repeat.
TGU: Turkish Get-up.
TTB/T2B: Toes to bar. Hang from bar. Bending only at waist raise your toes to touch the bar, slowly lower them and repeat.
WOD: Workout of the day.