vulgar slang An initialism for "big dick energy," referring to confidence and self-assuredness, especially when exuded in a calm or quiet manner. Although the term alludes to the confidence that may result from having a large penis, the phrase is not necessarily literal and is not exclusively applied to men. John is a guy who has the confidence to show his emotions without hesitation or embarrassment—that's total BDE, if you ask me. A: "I can't believe you were able to negotiate such a big raise. You've got some serious BDE, girl." B: "What? I just know I'm worth more than they were paying me."