Top definition
A basic mistake that an individual of female sex makes when she should theoretically know better.
Sally not putting on her make-up that day was a schoolgirl error.
by joeycaramel November 03, 2010
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug