girl math noun2 •(Internet, humorous) Logically and mathematically dubious reasoning said to be used by women to justify expensive purchases, which inevitably concludes that the purchase in question is "basically free" or even makes a profit.Samantha Jane, 28, from Toronto took to TikTok to share the concept of 'girl math' - which she says helps her to make financial decisions. She said girl math is a 'fun logic' and not a 'silly trend'. — 2023 •(slang) A form of (possibly fallacious) logic specifically used by girls or women.Girl's math and Boy's math are different on another level — 2024
