When you pour vodka into your mate's vagina and slurp it out making them cum so hard they start singing.
"I gave my girl a Dirty Sydney last night and she started singing Watermelon Sugar by Harry Styles"
"I prefer using straight vodka when giving a dirty Sydney." "Straight? No gay?"
When you have an orgasm so intense you see red, making you believe you are living under Vladimir Lenin's regime, in the Soviets Union.
Damn, I gave my girl Ellie a Dirty Lenin last night and now she's going around saying "the goal of socialism is communism."