double dipped
Past tense of dipping a chip twice into dip.
from Seinfeld:
"Did you just double-dip that chip?" 
"Excuse me?" 
"You double-dipped the chip." 
"Double-dipped? What are you talking about?" 
"You dipped the chip, you took a bite, and you dipped again." 
"So?" 
"That's like putting your whole mouth right in the dip. Look, from now on when you take a chip, just take one dip and end it."