青涩少年总有装b情怀

'Youthful Adolescent Has Always Pretensions': In this context, 'b' is an abbreviation for 'bighead', a term used in internet slang, referring to people who like to put on airs or seem self-important. This user might refer to themselves as someone who was young but often behaved arrogantly. Or, it also can describe a kind of typical mentality among youths that they tend to pretend or appear more powerful than they actually are to gain others' recognition.