Being a dick, and stealing the credit for someone’s idea or creation
You: ‘tells great joke’
Friend: lol nice
~later when you 2 are with more people~
Friend: ‘Insert your great joke’
People: lol that’s nice, great joke man
You: >:O
~Later~
You: ‘friend’ just totally stole my joke
Friend 2: yo, that’s thunder theft dude