"Sprengidagur" is the Icelandic equivalence of Mardi Gras. The Icelandic tradition holds the custom to eat soup made from lentils and vegetables accompanied with salted meat, a dish called “saltkjöt og baunir” in Icelandic. As this is the last day before Lent, a period celebrated by fasting, people would use the opportunity and eat their fill, many to the brink of bursting, hence the name.
Happy eating everyone 😀
Source: https://icelandmag.is/tags/sprengidagur