* Someone who makes you nauseous: This is the most common meaning. It refers to something or someone that is so unpleasant, offensive, or repulsive that it causes you to feel sick to your stomach. For example, "That movie was a total gagger."
* Someone who is easily nauseous: This meaning is less common but still valid. It refers to someone who is prone to getting nauseous or throwing up easily.
* A person who is prone to vomiting: This meaning is similar to the second one, but it emphasizes the act of vomiting itself.
It's important to note that "gagger" is considered informal and often used in a derogatory or humorous way.
Context is key: To understand the specific meaning of "gagger" in a particular situation, pay attention to the surrounding words and the overall tone of the conversation.