Rusty Saxophone
Rusty Saxophone is similar to a Rusty Trombone, except there is anal fellatio and fingering with no reach around, whilst giving the male excruciating blue balls due to the non pleasure of the genitalia.
Your mom is terrible at the Rusty Trombone! She gave me something I had to add to Urban Dictionary! I call it a Rusty Saxophone. My balls hurt so fucking bad.