In the context of public speaking, a "grabber" usually refers to an attention-grabbing technique or statement used at the beginning of a presentation to capture the audience's interest and draw them into the topic. A grabber can be a joke, a provocative statement, a surprising fact, a personal story, or any other device that makes the audience sit up and take notice. The purpose of a grabber is to create a strong first impression and establish a connection with the audience, making them more receptive to the rest of the presentation.