suck a sack

a derogatory phrase used instead of "suck my balls" because it makes you too sick to even begin to imagine that person sucking your balls.

seriously, shut up and go suck a sack.

suck a sack by gstash January 28, 2010

Suck-a-sack 

When you give a blowjob

"Hey how was it last night?"
"It was good"
"Did you suck-a-sack?"
"Yep"

Suck-a-sack by Yew sup March 5, 2017