A sexual act involving a man's erect penis, a Boston cream doughnut and fellatio giving a crude resemblance to the mounting of a break disk on a wheel hub. The doughnut is pressed onto the man's erect penis and once the penis has broken through to the other side fellatio is performed on the now cream covered penis.
"Fuck we were so drunk last night that after we got home from Tim Hortons, River busted out the last Boston cream and gave me the ole Boston Break job"
by Rolo Tony April 30, 2009