An acronym for "I Just Let Rip", ie: announcing to those around the proclaimer that they have just farted.
Generally used in the presence of guys only, due to their primordial need to compete for the best fart.
Guy 1: DUUUDE! IJLR and it fukn reeks!
Guy 2: You're a majorly sick fukker man!! Get the hell away from me you smelly basta'd!
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