The Brief: BDE stands for "big dick energy."

Bluesquiggle
DEEP DIVE

BDE refers to an air of confidence that someone exudes. It is not directly about the size of one’s penis, but is a metaphor used to signify that someone has the self-assurance of a well-endowed man. BDE is the opposite of cockiness or toxic masculinity.

The term was coined online in 2018 by Twitter user @imbobswaget in reference to Anthony Bourdain:

Pete Davidson has been labeled as a quintessential possessor of BDE.

Men and women can have BDE. According to the internet, Rihanna, Diplo, Idris Elba, and Cate Blanchett all have BDE.