In short, it refers to the triangular-shaped gap some women have between the top of their thighs and butts that, theoretically, you could fit a Toblerone chocolate bar through.
But here’s the thing - every figure is different. Some women’s hips are structured in a way that they automatically have one, while others have thighs that will always touch no matter what. Which is why The Toblerone tunnel is just another unrealistic and problematic goal to aspire to.
Thankfully, many on social media are calling this out: