A word used to explain a chick that either: A- You pick up as soon as you walk into a bar or party setting

or B- Shows serious interest or comes on very strongly as soon as you show up

The term is derived from a fishing reference where - as soon as your cast hits the water, your hook hooks into the fish's gill - catching the fish right away.

A buzz word being used to refer to creators and influencers forming or encouraging unhealthy relationships with their fans. Usually used in the context of young audiences feeling they have a relationship with the influencer due to the huge amount of the influencer’s content they consume. The influencer in question, however, is unaware of the fan’s existence other than the general knowledge of having fans. Common examples include Dream and his stans. These relationships are exacerbated by the influencers confirming they have more than a creator-to-viewer relationship.

The word is circulating due to various YouTube essays about the phenomenon using the word, and therefore people who enjoy complaining about influencers repeating what they heard in the video in any comments section they can find.

You disapprove of something someone said, automatically making them a "Giller".
This word usually lets the other person know where you stand with their suggestion / comment / plan.
Usually used after the companion says the offending sentence but in enxtreme cases you may interuppt and say loudly and proudly "Giller"
You may also optionally add either "Thriller" or "Killer" to further add to the situation.