Top Definition
the act of waking a girl up in the middle of the night by slapping her in the face then immediately ejaculating on her face
so last night i sprung the knap attack on her right after she fell asleep
by The Knap attack November 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.