a combination of derp and whimsical, describing a pattern, aesthetic, design or arrangement that appears to have been conceived by the imagination of a child, and put into place by angry raccoons.
1. That new NPC village we just found was totally derpsical.
When someone does the very same ignorant action or comment that some other dumbass just made.
Person 1. *burns hand* "owwww"
Person 2. "haha you burned yourself". *burns hand the same way* "owwww"
Person 3. "congratulations! person 2, you just did a successful derplication of person 1."