A phrase that is apparently 'trending' as of May 2020.
Why? Do I look like I know?
Just be a man and say 'dick' for fuck sake.
Okay now that thats over with, the phrase suck a duck is basically the same as suck a dick, except that the person saying it doesn't want to offend someone by saying the word 'dick'
If you couldn't figure that out yourself, I'm disappointed.
Person A: "Hey, B! I dare you to shout 'suck a dick' out loud in class!
Person B: "Okay..."
Person B: (shouting out loud): "SUCK A DUCK!"
Person A: "You fucking disappoint me, B."
Classroom: