What is the meaning of "odd behavior'?
*assistant ESL teacher
"odd behavior" is the same a "strange behavior" or "unusual behavior".
It means that someone is doing something that they don't normally do. Or it could be something that is considered not socially normal.
If your mom makes a perfect dinner everyday, but suddenly starts making only frozen meals, then that would be "odd behavior".
If you go to the grocery store and the cashier says, "blip" when she scans each item, that would be "odd behavior".