When acting as a bench press spotter for a male partner, Glifting involves dangling ones testicles into the mouth of the lifter on the press. Similar to 'teabagging' but specific to male bodybuilders - derivation is believed to come from a combination of 'Gay' and 'Lifting'.
'Nice curls you were doing there, Jeff - fancy a spot of glifting? Don't mind if I do, Roger - I hope you've shaved your balls this time!'
Flirting between two people of the same gender, one or both of whom may be straight and who are not actually attracted to each other. More common among females, but used humorously by males. From the words "gay" and "flirting".
Dude A: Matt, I know what you like!
Dude B: Bro, are you glirting with me again?
Getting In There with someone, which is where the GIT is derived from. Can be used in a normal conversation between people and other people will not realise what is being said.