What does weirdo mean?
“Weirdo” is an informal noun for someone whose behavior, appearance, or ideas seem strikingly unconventional, eccentric, or bizarre. In ordinary conversation, it usually presents the person from the speaker’s perspective and may suggest amusement, curiosity, confusion, or mild disapproval rather than a precise psychological judgment. The word can be teasing or affectionate among friends, but because it may sound dismissive or insulting when used about a stranger, neutral contexts often prefer “eccentric,” “unconventional,” or simply “odd.” The expression is especially common in British and American English, though its use is not limited to those varieties. As a vivid, slightly blunt label, “weirdo” is useful in informal speech and creative writing when the intention is to characterize someone as unconventional without a lengthy explanation. Its history is also revealing: it combines the older word “weird” with the informal suffix “-o,” a formation used to create familiar, playful noun labels.
nounA person regarded as being unusually strange, eccentric, or unconventional.
- A person who is regarded as strange, eccentric, bizarre, or unconventional.
"Mina called the neighbor with the rooftop telescope a harmless weirdo, but nobody else admitted to seeing him."
"Mina called the neighbor with the rooftop telescope a harmless weirdo, but nobody else admitted to seeing him."
"The new employee's elaborate spreadsheet system seemed like the work of a weirdo until the results proved remarkably useful."
The standard plural adds -s to the singular form.
"Several of the local weirdos gathered outside the station to watch the trains."
From “weird” plus the playful suffix “-o,” “weirdo” turned unusual behavior into a label for a person.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does weirdo come from?
Weirdo developed in the 1930s from weird and the informal noun-forming suffix -o. Weird itself descends from Old English wyrd, meaning “fate” or “destiny,” through older senses associated with what was fated or uncanny. Related forms include the archaic wyrd and the etymologically related word world.
Related word forms
How weirdo is actually used
Chiefly informal and often mildly dismissive or teasing, though it can be affectionate among friends. More neutral alternatives include eccentric, unconventional, and strange.
Easily confused with weirdo
Weird is primarily an adjective describing something unusual or a verb meaning to cause discomfort, whereas a weirdo is a person regarded as strange or eccentric.