The word "more grabber" doesn't exist in the English language. However, we can discuss antonyms for the word "grabber," which means something that grabs or attracts attention. Its antonym, therefore, would be something that repels or fails to seize interest. Words like dull, boring, unremarkable, and uninspiring could be antonyms for "grabber." These words denote a lack of excitement or curiosity and are the opposite of a grabber that is attention-grabbing, captivating, and intriguing. In other words, if something is not a "grabber," it is an antonym of the word and fails to captivate its audience.