A common misspelling of the phrase "just deserts". While the two phrases are pronounced exactly the same, "desert" with the emphasis on the second syllable means something that one deserves, rather than an extremely arid expanse of land. "Dessert", on the other hand, is a sweet dish consumed after a meal.
shane123: lol i guess he got his just desserts
rob497: i think you mean "just deserts"
shane123: fuck off u grammar whore
rob497: okay jesus