Bolliger & Mabillard, roller coaster manufacturers. B&M coasters offer a very smooth ride, and the characteristic roar caused by the polyuthereane wheels on hollow track.
B&M is so called because of its founders, Walter Bolliger and Joseph Mabillard
Examples of B&M coasters include: Nemesis, Oblivion, Mantis, Raptor.
OMG that B&M was great! How do I know that was a B&M? By the characteristic roar! Did I mention I'm a rollercoaster enthusiast?
An absolutely foolproof way to keep minors from viewing content deemed "too mature" for them to watch.
Billy: "So I was trying to watch some videos for an M rated game, and I ran into an age gate, so I put in my real birthday. SOMEHOW it managed to figure out that I am 12. CURSE YOU AGE GATE!!!"
Bill: "Fucking age gate! *quick scroll* THERE! I was born on January 1, 1904. Fuck you age gate."