What is the punchline of your favorite joke?

I take attendance by asking students a question.

What is the punchline of your favorite joke? (previously)

• everything was covered in "de-brie"
• "You're funny... funny looking"
• "Maybe next time you should estimate me!"
• drum noise
• laugh (hopefully at others)
• lmaoooo
• A grasshopper walks into a bar... find me for the rest
• "It's you guys, the audience"
• lol
• You are a joke
• Yo' mama
• dab
• fshhh
• porcupine
• gottem
• Don't leaf me I'm bushed!
• ketchup
• this suit is black not
• I don't remember
• uh... I forgot it
• that's what she said
• Stone Cold Steve Austin
• You're bad.
• gottee
• Deafening Silence
• I don't have any favorite joke
• Babanana
• "forcefully ejecting air out of my nose"
• that's it
• Told you so
• hole in one
• N/A
• 189

Some of those were mysterious.

This post's theme word is robustious (adj), "strong and sturdy; boisterous; coarse or crude." I suspect some robustious jokes are hiding in there.