The story
- Middle English · derived fromblabbe“idle talk; talebearer”
- Middle English · inherited fromblabben“to talk foolishly”
- English todayblab
From Middle English blabben (“to talk foolishly”), perhaps from Middle English blabbe (“idle talk; talebearer”). Compare Middle English blaberen (“to blabber, babble”), Middle High German blabezen (“to stammer, babble”).
Etymology from Wiktionary, CC BY-SA 4.0.