Usually it's chalked up to dizziness, but dizziness is a broad term that can mean different things to different people. It's a common complaint, but it can be serious. Vertigo . The feeling of motion when there is no motion, such as you spinning or your environment spinning.
Shrimp definition, any of several small, long-tailed, chiefly marine crustaceans of the decapod suborder Natania, certain species of which are used as food. See more. Dictionary.com
The terms true shrimp or true prawn are sometimes used to mean what a particular person thinks is a shrimp or prawn. This varies with the person using the terms. But such terms are not normally used in the scientific literature, because the terms shrimp and prawn themselves lack scientific standing.