i always thought it was:

BRIT(as in Britain) - TAX (as in taxes)
and
CHEE (as in Cheetos) - KO (as in Coke)

I was at a big local baby gear store the other day, and more than one employee was pronouncing it:

BR-EYE (as in eye ball) - TAX
and
KEE (as in kiwi) - KO

have I been saying it wrong the whole time?

just wondering what you guys have heard!