It's always rough when the team atmosphere isn't focused. The problem is that unless you've done all star or come from a very competitive pop warner/school background, girls just don't understand the work that goes into everything. Sounds like they need a good butt kicking.... If your coach is willing to stand strong and enforce this, start up a hard core conditioning routine(running a mile, mountain climbers, V ups, you name it) for all of your practices and a set list to do at every practice such as : 5 of every jump(done well together or it doesnt count) plus double/triple toe, ___ many (certain type of stunt) done clean and on time, etc.......... The goal of the first practice of this is jello legs by the end of working out! Its going to suck at first, but if its hard core training, the wussie ones will complain like no other and some may even say they're going to quit or will quit, but the training will get easier over time and it will weed out the slackers/ones who dont want to be there. Plus y'all will be in great shape and your jumps will improve dramatically!
We started this after tryouts my senior year because we had some slackers the past year and it turned out to be the best team in my 4 years of high school (Attitude and skill wise)! I was so exhausted after the first time we went into "training" mode and after practice went home and fell asleep at like 5pm haha. My coach always said "You guys complain about wanting others to see cheer as a sport, so lets treat it like a sport."