When you're herping the derp by derp derping around. Usually done on the internet.
Person 1: Why didn't you answer my call?

Person 2: oh sorry i was busy derping around.
by Bobby Boosha January 13, 2011
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1. Normally for those who are witless or stupid.
2. To be scared and coughing at the same time.
A1: "Wow. This dude was derping a ton during his jog!"
B1: "I'm pretty sure that's asthma."

A2: "Wow. This dude was derping a ton during his jog!"
B2: "I'm pretty sure he was an idiot."
by mmmmmmmmmmmmmmmmmh December 4, 2020
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Kevin, upon seeing the large quantity of lasers, began derping.
by Kat the Scalie December 3, 2020
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"Is 'derping' still being used? Do people even say that or is my boomer showing? If its not being used, could I change its meaning to 'scared and coughing?'"- CallMeKevin 2020
by Jim Pickens's victom December 3, 2020
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The state of being scared and coughing simultaneously.
*is frightened by something while beginning to cough*
"oh, I'm derping! This is awful!"

"kevin derped"

"i think Jim is having a derp fit, let's go check on him"

"Turg often scares himself with his coughs, he's a real derper.(possible, but not commonly used)"
by Grognak The Destroyer December 4, 2020
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1. Internet slang for trolling.
2. In traditional gaming jargon, engaging in a discussion that goes way outside likelihood or canon without any serious intent.

See also derp.
1. Do you actually believe that Twilight is the best ever or are you just derping?

2. "You were saying Wizards of the Coast will bring back halflings as the true beloved of Ao?" "Nah, I was just derping."
by Shaviv January 21, 2009
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