Uncharacteristically

Full definition of uncharacteristically

Adverb

1. In an uncharacteristic manner.
• 2012, May 27, Nathan Rabin, TV: Review: THE SIMPSONS (CLASSIC): “New Kid On The Block” (season 4, episode 8; originally aired 11/12/1992), This newfound infatuation renders Bart uncharacteristically vulnerable. He suddenly has something to care about beyond causing trouble and makes a dramatic transformation from hell-raiser to gentleman about town.