Jeggins are half jeans and half leggings. This doesn't
mean literally half in half but the fabric is stretchy and
soft like leggings.
Ell: "Hey Amy those jeans you're wearing look great"
Amy: "They're not jeans!"
Pete: "Ah they're leggings!"
Amy: "
NOPE! They're JEGGINS!"
Ell +
Pete: "Damn! They're amazing! I want some Jeggins"