Top Definition
The morning on which a male wakes up and finds his cock to be much larger than the day before. Usually accompanied by fervent celebration, and parties (usually sex parties).
Todd: Dude my dick grew 1/2 an inch in girth last night!

Manuel: Congratulations man! Happy Girthday! Are you getting laid tonight?

Todd: You know it man!
by FuctButSects October 22, 2010
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.