Scintimammography or Screening Mammography (SMG) is a breast examination technique where a woman's breast is squeezed between two compression plates.
In pornography and BDSM, SMG is bondage of a woman's breasts, often with ropes (Shibari) but possibly other homemade or store-bought items, where the breasts are cinched rather tight, causing them to become more sensitive and darker, purplish in color.
When my girlfriend and I are playing with ropes and I am tying her up in a bikini chest harness, she wants me to wrap the ropes around her boobs pretty tight. She loves the feeling of SMG as much as I enjoy doing it!
SMG Gun- small midgets ghosts gun
Use by small midgets ghosts to scare people. The gun is up to 4 feet tall. They use the SMG Gun because that's the only way to scare their victims. (They are to short for their victims to see)
P1: Come here and taste my SMG!
P2: Fuck that i have a rocket launcher!
*P2 fires rockets and misses*
*P1 Kills P2 with a single SMG*
P1: SMG BITCH! *Teabags*