The Giant Barbed Q is a prop that appears in the episode "Texas."
It appears to be a giant piece of metal or stone that is in the shape of the letter Q. It also has spikes on it.
Role in episode
When he hears Sandy sing in the song "Texas" about how she misses barbecues, SpongeBob mishears it as "barbed Q's." He plans to have "barbed Q's" for the surprise party he makes for Sandy to persuade her to stay in Bikini Bottom. Squidward holds the Giant Barbed Q during the party.