A term collectively used by the fans of New Kids on the
Block to describe the NKOTB members' accents when they speak. Being from
Boston, the band members have distinct accents that the fans have embraced and even mimic to an extent.
Practically
any word ending in (-er) or (-ar) can be translated into Bostonese by replacing the suffix with (-ah), such as in "glittah" "sweah" or "bettah."
Bostonese:
Joey Mac bettah be tweeting on Twittah tonight, or I sweah I might have a heart attack!
Plain English:
Joey Mac
better be tweeting on Twitter tonight, or I swear I might have a heart attack!