Noun - A joke that is completely unfunny and beyond cheesy. A joke that will stop any points of laughter in a group and cause the person who said the joke to face ridicule. Whenever someone makes a terrible joke you call them out by saying "tampoff"
Verb - calling someone out on a bad joke (to tampoff someone)
The original tampoff: Person 1: "We couldn't have sex because she had her tampon in" Person 2: "Tampon?? Don't you mean, tampoff?"
Example of it in use.
Person 1: Did you know they created health care for alligators? It's called Gator-Aid. (gatorade)
Person 2: Dude, tampoff!
Describes someone who while communicating over the internet googles information and then portrays it as their own thought or as if they always knew the information they are displaying without looking it up mid-conversation.
Person 1: "Everybody knows that Rutherford B. Hayes was the 19th President of the USA"
Person 2: "Dude you're full of shit, you just googled that. You're not smart, you're Google Smart"