I like how ‘boak’ is used like a Chinese word, it’s a verb and a noun all at once.
The most popular use appears to be, “_____ gave me The Boak.”
Here, clearly, it means _____ has given our speaker a feeling of nausea.
You can also say that someone (or yourself) Boaked. I have Boaked many times in my life, most notably in front of the church I used to attend (in the drain, lah, I’m not so disrespectful of other people’s property, even when I’m hammered).
Here is an image of The Boak:
Solomon the tiny turtle drank a lot of Edradour whisky, and it gave him The Boak. He Boaked, and got Boak all over the table.
I’ve never heard of someone Boaking, though.