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.
Andy: Woah Devante, your cheeks look huge, and there are some crusties on your pubes. You stink like ass hole too.
Evan: That's because he just got Sachmo'd by Miss Salupo.
Miss Salupo: :) My turn.