Perfect Storms (2013)

S4E29 That's No Lady

When Patrick misinterprets a vacation ad, he believes he needs to escape town to avoid serious trouble. SpongeBob, horrified at the idea of his best friend leaving, takes it upon himself to conceal Patrick's identity from those chasing him. After several unsuccessful disguise attempts, they finally hit on a brilliant idea: transforming Patrick into a girl named Patricia. With her new persona, Patricia attracts the attention of Mr. Krabs and quickly becomes the most delightful server at the Krusty Krab.