absorbing a cost equally between two people
dude, do you want to go halfsies with me on that killer mud pie?
by So Mach April 28, 2006
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A more fun way to say "half," or "part-way".
Why would you go halfsies with that halloween costume and just wear a hat? You should go all the way and wear the whole outfit.

Want to go halfsies with me and split the cost of dinner?
by cirrus42 January 25, 2012
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semi-derogatory term of half canadians used by kevin smith on smodcast 88.
we don't fuck halfsies in brantford, all canada or nothing.
by gunnar89 August 31, 2009
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when you get an erection that is only about half way erect. This happens when you are subconciously turned on.
Aw dude! I got halfsies when I was petting your cat. I got halfsies when my aunt gave me a massage. I got halfsies from riding a horse.
by Sam-da-man September 18, 2008
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half-brothers or sisters. people who share one parent, but not the other. eg, people with the same mother but different fathers.

you could also spell or pronounce it "halvsies", but you'd look like a retard.
Girl1: "I thought you had a brother. How come I never see him anymore?"
Girl2: "My sister and I live here with our mom, but our halfsies live in Texas with their dad."

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Guy1: "Megan and Ryan are spending a lot of time together. Are they dating?"
Guy2: "No way, man! They're halfsies!"
by MattJ77 March 12, 2009
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Most usually (East coast), any person with any type of shine (black) in them.
Hey Gino, that new kid looks awfully tan. You think he is a halfsie? Antnee, you know his moms a shine, he’s a halfsie for sure.
by Joe bananas August 18, 2021
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The spelling Halvsie refers to someone who is of mixed halves of races or ethnicity.
usually half Japanese and half caucasian in descent. e.g. 'Devon Aoki is a hot halfsie'
by pavistroni June 25, 2007
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