First of all it is Brazilian slang. means someone who wears expensive clothes, is from the favelas, ghetto or hood, or is involved in robbery. It's used for men and women.
Ow essa mina é mó mandrake, só usa Nike
"ow, this girl is really mandrake, she just wear Nike clothes"
Ele nunca foi preso pela policia, mó mandrake
" he was never arrested by the police, really mandrake"
Ela é da favela, não fode com ela. É mandrake
"she is from the favela don't fuck with her. she's mandrake"
a "style" that kids uses most like they use glasses called "julietes" that have painted glasses uses a skeleton leg or ice leg like the 2017's and yes they use "fds" as your argument trasleting its "screw you" or in portuguese "foda se" they are most seen in games with boobox or clothering game they do truth or dare that most of times they dare to "kiss" their virtual girlfriend and they are 9-12. And they online date LOL
Bud of mandrake is a form of insult found in the Falstaff verdi (opera). This phrase is said early on as an formal insults by Dr. Caius in a duel against Gun.