Badass Sexy Mother-fucker.
A term used to describe people who are not only badass but who are also sexy.
This term could also loosely apply to Bellatrix Lestrange.
I wouldn't do that if I were you. The BASMF (meaning Lucius Malfoy) will come after you.
Bad-Ass, Sexy Mother-Fucker
That dude Jonathan is one BASMF!