I said a joke not a poem is a popular frase from Jacksucksatlife.He asked the person to say a joke but they said a poem and he said that.
Jack:Say a joke.
Person:Roses are red ,violents are blue , i love your vids, pls dont ban me.
Jack:I SAID A JOKE NOT A POEM!!!!
When someone wants to make a dirty joke but doesn't say it and leaves it to the listeners imagination.
Arisa: *Eats a hotdog*
Reg: "I could make a joke right now."