Underground Jokes

I taught a dog to play the trumpet on the London Underground.
We went from Barking to Tooting in 20 minutes!
You're hotter than the London Underground during rush hour.
I Was Going to Tell a Joke, But...
I'd tell you a confidence joke but I'm insecure I'd tell a war joke but I'm afraid it would bomb I'd tell an enema joke but you couldn't hold it in I'd tell a flogger joke but it doesn't have much impact. I'd tell a bondage joke but it's too restrictive. I'd tell you an underground railroad joke but you'd run away. I'd tell a monotone joke but it doesn't have any range I'd tell a hanging joke but I always choke \I'd tell you a constipation joke, but it's full of... well, you know. I'd tell a Wesley Snipes tax joke but it's too evasive I'd tell a big ass joke but it's too much to grasp I'd tell an amputee joke but I don't have a leg to stand on I'd tell a cyber-security joke but you couldn't hack it I'd tell a joke about a joke but it'd be recursive I'd tell a pot joke but it's half baked I'd tell a small penis joke but there's not enough there I'd tell a gay joke but I'm not sure I could tell it straight I'd tell a porky pig joke but tha..tha..that's all folks!
Although many other vegetables live above the ground, onions live underground. This is because they have many lairs.
You do not want to know the history behind the railroad because it is so underground.
Why did the worm cross the playground?
To get to the underground slide!
You're hotter than the London Underground during rush hour.