primarily a noun but can be used as a verb; the act of violently and audibly inhaling of a beverage, best used for carbonated beverages like soda or beer, but also appropriate for water, juice, mixed drinks, etc. most likely has routes from the verb "slug"
Someone who is very comfortable with physical affection (think Abby Scuito from NCIS) and is not afraid to be bold in initiating it, especially with their significant other.
Boy: "What are you doing?"
Girl: "I'm an aggressive snuggler. Deal with it."
Slightly scared, he put an arm around her waist and let her hold him, not wanting to feel her wrath.