bklyn may be the acronym for Brooklyn, NY An "Acronym" for "Brooklyn". Widely used by individuals who feel should show they truly are from there. Or perhaps sluggish folks, many stupid folks. It is sometimes applied to MSN Messenger and various cellular phones (Virgin Mobile, Fido ect.), txting backwards and forwards. Possibly even spraypainted on structures, and scribbled in restroom stalls.Some of us discover "Bklyn" a totally terrible and disgusting abbreviation for "Brooklyn". Annoys me over "the big apple" does.