Top definition
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.
Example 1.
Guy 1: How was the bar last night brah?
Guy 2: Dude, picked up a Giller... She was all over me before the tendy even handed me my first beer!

Example 2.
Guy 1: Where'd you go last night broski? You left so early?!
Guy 2: Found myself a Giller as soon as I got there budski
Guy 1: You bang that Giller or what?!
Guy 2: You know what they say... if she smells like salmon, go slammin'!

Guy 1: I knew it!
Guy 2: Nope, she smelled like Trout so i got the fuck out!
Guy 1 and Guy 2 smiling and shrugging simultaneously: FUCKIN GILLERS
by CutiePrincess69 July 13, 2017
Get the mug
Get a Giller mug for your buddy Callisto.
2
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.
Situation 1

Person A: I think you should lend me a ciggerette.
Person B: No i always lend you them, you never have any
Person A: Come on i always give you them back.
Person B: Oh for god sake your a giller

Situation 2

Person A: I'm going to mess around with your sis....
Person B: YOU GILLER KILLER / YOU GILLER THRILLER
Person A: ...tem
by Cainzor October 03, 2006
Get the mug
Get a Giller mug for your barber Nathalie.