Top Definition
A rash obtained upon sleeping with a person in possession of unclean genitals. Can be used to describe a yeast infection.
"Ah man, I totally did that Hillary check so hard last nigh"

Friend: "watch out buddy, the last person she boinked got a smashrash"
by Turbanate May 12, 2013
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.