I'm going to level with y'all, I hate warming up. Part of it is I don't like working on mobility, I just want to get in smash my workout and get out.
But all kidding aside, warming up is a must. That's why I use this quick and dirty barbell warm-up.
Here's how it's done; approach the rack and using only the barbell perform 10-12 reps of each of these movements. Rinse and repeat up to 3 times.