A white, viscous liquid adhesive which is waterproof when dry. The most common use is in buildings, to seal spaces (i.e., around windows) that would ordinarily reduce the efficiency of insulation.
Frylock: He - man - what the - you've been eating all my caulk!
Meatwad: Caulk? Nah, this is cheese!
Frylock: No, it's highly toxic industrial adhesive, used to connect electronic circuitry to steel. It's caulk!
Meatwad: And it's good, too!
Frylock: Listen to this, OK? Avoid human contact. May cause dizziness, nausea, and an ability to THINK you can see the future, but you can't!
Meatwad: Well, what does it say about finding oil?
Meatwad: Uh oh.