Washing her hair.
3 seconds sound clip from the Animal House (1978) movie soundboard.
You can hear this line at 00:41:57 in the Blu-ray version of the movie.
Quote context
[...]
- Trying to steal your boyfriend? Her boyfriend. And not your boyfriend? Not my boyfriend.
- Speaking of boyfriends, Mandy, how was your date with Greg?
- Those assholes must have stolen the wrong fucking exam.
[...]