"No, this is Patrick" is a line from the Spongebob Squarepants episode Big Pink Loser. The line comes from a scene where Patrick Star is working at the Krusty Krab. He repeatedly answers the phone, with the patrons on the line asking him "Is this the Krusty Krab?" Patrick, mistakenly assuming they are asking if he is a "crusty crab", denies this by saying the aforementioned line. With each caller Patrick gets more agitated, eventually shouting the line and slamming down the phone.