Weirdo
A person whose behavior seems strange, unsettling, or far outside the expected norm.
“Making fake accounts to watch your ex is weirdo behavior.”
Weirdo ranges from playful teasing to a serious warning about inappropriate conduct.
Weirdo is a 20th-century extension of weird that became common in youth slang and online callout language.
certified weirdo
A strongly emphasized label.
little weirdo
A softer or playful version.
weirdo behavior
A phrase targeting conduct rather than identity.
Is weirdo a strong insult?
It can be, especially when it implies creepy behavior.
Can friends say weirdo jokingly?
Yes, with a clearly playful tone.