you could also spell or pronounce it "halvsies", but you'd look like a retard.
Girl2: "My sister and I live here with our mom, but our halfsies live in Texas with their dad."
Guy1: "Megan and Ryan are spending a lot of time together. Are they dating?"
Guy2: "No way, man! They're halfsies!"
Kyle- What the fuck is taking so long
Dan- Bro i got halfsies so bad right now
Kyle- Damn that sucks your gonna struggle the rest of the day
Dan- I know thats why im trying to get it all out now!