Slang A person regarded as being very strange or eccentric.(noun)
Slang A deranged, potentially dangerous person.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "weirdo" in a sentence
"He was rewarded with the nickname "weirdo" by puzzled teammates."
"Imagined Legend weirdo is perplexed fails back on the weak solution."
"But the way he rattles through his pieces, flipping off a little of this, and then a little of that, showing off his brilliance, reveling in weirdo paradoxes, isn't going to appeal to many who aren't already smartypants autistics."