The phrase "handstand push" refers to a physical exercise where you hold your body upside down in a handstand position and use your arms to push yourself up and down. Full definition
Advanced participants also do handstand push ups, one arm push ups, one legged squats, and weighted pull ups. (muscle-fitness-training.com)
When I started doing handstand push ups my shoulders started looking noticeably better. (fitnesswayne.com)
And as for that handstand and getting my final toe off the wall, I hope to reach that small goal soon, on my way to the larger goal... a full handstand push - up! (glutenhatesme.com)