Bobbing for is a term that describes the act of dipping or plunging one's head or hands into water to retrieve an object. The antonym for bobbing for could be "tossing out," as this phrase implies throwing something away rather than trying to retrieve it. Another antonym could be "keeping in," which suggests holding onto an object rather than releasing it into water. Additionally, "looking away" could also be considered an antonym, as it denotes the opposite action of staring at an object and attempting to catch it. Ultimately, antonyms for "bobbing for" evoke the opposite actions of retrieving or taking possession of an object.