GillennialX 

It's when a Generation X population member behaves like ones of the Millennial generation.

David had a meltdown and felt entitled to help over a problem he was having, for a 40-year-old mature man he surely exhibited some GillennialX behavior.

GillennialX by Hixxz68 July 26, 2018

gilpin 

A gilpin is a term for "sucker" or "chump" that dates from as early as the 1910s but rarely appears in the modern century. Consider this line from

1) James Cagney's taxi driver friend in THE ROARING TWENTIES (1939): "To Long Island it's fifteen dollars for the wise guys, 30 dollars for the gilpins."
2) Cagney, upon realizing he was naive, says, "I was a such a gilpin."

gilpin by MTyeW23 February 9, 2017

Gillen Bag Pipe 

While doing doggy style you reach around with one hand and fiddle the vagina and with the other hand play with the breast.

Mom told Ally that last night Dad did me doggy style while fiddling with my vagina and playing with my boob. He called it the Gillen Bag Pipe.

Gillen Bag Pipe by CougarDAD December 22, 2008

Gilden 

of the guild, refering to goldmiths,siversmiths and the like. Alsorefering to a"soft"person.

Chris is a gilden. (Chris is soft/not manly.)

Gilden by mrmegahurts June 23, 2009

gillen 

a hot stud who has all the answers

gillen has a huge weewee

gillen by webster's dictionary February 22, 2005

gilena 

a very intelligent, pretty and kind of person. a one of a kind and only one in a billion people. a true friend that gives great advice and gives you the perfect company you could ever ask for. also very appealing, secretive, and open-minded.

Oh, Gilena.... She's the Best Bestest Friend I could ever ask for!.

gilena by pseudoephedrine hydrochloride August 16, 2021

Lewis Gillen

Thinks he’s the champ, would get knocked out by my right toe. His hairline is offside. His little brothers the bigger man. Secretly gay but hides it. Loves being aggressive after a few pints but scares no one

Just when we were leaving your man pulled a Lewis Gillen and tried to scrap everyone. Pure sausage

Lewis Gillen by SoundLad69 May 6, 2020