How do you Holo Hump?

I’ve played the game for a good 12 hours now and I can’t seem to get the -Yoink!- HoloHump working. For those who don’t know, you’re supposed to be able to -Yoink!- dead enemies with your hologram. Did they remove this funny little feature? Or is there a certain guideline on doing it?

spits out water, then falls off chair, laughing on floor

oh god…once you kill you opponent send out your holo and he’ll be having fun.