These are some lines from Spongebob that I love!
Spongebob: "It sounds like someone...wants to sell me something!"
haha oh that one cracks me up. ok here's another
Spongebob: "What do we do know Patrick?"
Patrick: "Let's get naked!"
Spongebob: "No, let's save that for real Estate."
Spongebob: "Bye, Squidward, Bye Mr. Krabs....Bye Squidward."
Patrick: "You said bye squidward twice."
Spongebob: "I like squidward."
Spongebob: "What kind of Monsters are we? Squidward has always been there for us when it was convenient for him."....."A one A two A skeily diddly do!
Those are just a few. I have many others that I can't think of. If you think of any more good ones, put it in a comment or something.