An extension of the sexual act known as a "Rusty Trombone." To get a rim job, with the reach around, with the addition of the receiver farting to blow up the cheeks of the person doing all the work, thus resembling Louis Armstrong... "Sachmo."

Sachmo is when you perform a rusty trombone, and the giver farts in the receiver's mouth. This puff of gas causes the cheeks to expand and puff out, and the cheeks look like Sachmo's.

word comes form the trumpet player Lewis Armstrong's nickname "sachmo"

a girl with good head.
a girl that knows how to "blow"

Another word for a sausage roll