When someone is doing something and you go up behind them and shake them vigorously while shouting, "CHALLENGE MODE!", causing them to totally screw up what they were doing.

It makes everything so much harder because it's challenge mode.
Katy was doing her homework when David came up and shook her shoulders crazily and shouted, "CHALLENGE MODE!!!!11!1111!!1!!!". Katy's homework was ruined because her pencil went all over the place.

Then Katy pwnd the nubcake.
by bullsunshine November 1, 2009
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The dark mode challenge is a funny internet challenge.

All you need is a car and night.

You have to wait for the night, turn off all lights in and on the car and drive 20 km at atleast 100 km/h or 30 km at atleast 60 km/h.
If you completed the required kilometers, you have mastered the challenge. Now, you gotta upload a video of it on Tiktok.
Have you already tried the dark mode challenge? It is really fun
by Sir Asbestos August 29, 2021
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To go 30 days straight doing 50 push ups 50 sits ups and a 5 minute plank and cold showering every day while doing a No-fap challenge all at the same month.
“God-mode Challenge can change you both physically and mentally.”
by bubbawatson April 24, 2020
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