Suck my balls.
Used to sign off letters or emails to someone you don't like or you consider the content pointless.
Hi John, Please find below information that you already have available to you. Eliot. SMB.
SMB a texting symbol that's stands for shit my bed.
Gas prices got so high I almost SMB.
"Smoke My Ball Skin"
When an individual has enough extra ball skin, that it is possible to roll a blunt out of it, and smoke it.
Can also be used as an insult.
"Oh wow, the guy I hooked up with last night had some real bad SMBS drapes"
"I'm getting real sick of all this nonsense, SMBS"