Social-colleague 

A person who is not quite a friend yet but more than an acquaintance. You take part in light-hearted chat and would most probably only talk to them if you were with a group of people; the same goes for hanging out with them. You also might say Hi to them when meeting in the street, but you wouldn't stop and chat.

Dave: Can you get Fred to lend me Spiderman 3 on DVD? I don't really know him that well.

Gary: Hmmm... I'm not sure if I can ask him yet, we're really only social-colleagues at the moment. Ask Kyle though, he was at friend level last time I checked.

Social-colleague by shrimpsy October 24, 2009

nightmare sister colleague 

A workplace cohort who has taken it upon herself to take on the role of a nightmare sister, finding ways to endlessly embarrass, harass, prank and annoy you to the point of near-insanity.

When I wake up some mornings I find myself breaking out in a cold sweat just imagining the weird and unexpected things my nightmare sister colleague might do to me that day.

nightmare sister colleague by Dr Bunnygirl October 12, 2019

m'colleague 

Sort of a lovely nickname used between British actor/writer Stephen Fry and Hugh Laurie
Can be abbreviated as "m'coll"
And you can use the word "y'coll" when refering one of them to the other（as the short form of "your colleague", obviously）

"M'colleague has noticed that, besides the usual court circular of saints, battles, dance craze etc, today is the 30th anniversary of Jeeves and Wooster. I wish him, and anyone who enjoyed it half as much as we did, tinkerty tonk." ——Hugh Laurie on Twitter, 4/23/2020

m'colleague by And theyre my otp June 24, 2020

bentley park colleague 

this is a school filled with fuck boys and over dramatic white girls and a lot of cook islands. the cook isalands are the scary ones of the school just stay out of their way. pot and weed can also be smoked in the bathrom and behind the quantaf building you just need lot of people.

a bentley park colleague kid just walked in keep an eye on him.

bentley park colleague by holafart October 27, 2018

Xbox Live Colleague 

A person you know in real life, but are only friends with them on Xbox Live.

"Dude, you wanna go hang out tomorrow?"
"...We're Xbox Live Colleague. Let's play cod instead."

Xbox Live Colleague by Lisfordislexia August 10, 2009

Work colleague 

A super best forever friend

Kathy and Aaron are work colleagues

Work colleague by A-Raw August 17, 2018

digital colleague 

Someone you have never met IRL (in real life) but have corresponded with online and therefore have a "digital" relationship with.

Often abbreviated simply as "DC".

ETYMOLOGY:
I've not been able to determine where or when this term was first used, but I was made aware of it from reading a blog entry at www.My-CreativeTeam.com

Might have originally meant to describe those you've ONLY corresponded with via online text through SNS's (social networking sites), internet forums (discussion or message boards), E-mail, IM's (instant messaging), etc... but seems to have also grown to include those you correspond with via voice through VOIP lines (as in Skype or broadband phones), cell phones, or landline phones.
.
.

I am a real estate agent and have lots of digital colleagues over on ActiveRain.com where we all interact with each other for venting, brainstorming, advice, and business referrals.

We have the confidence to refer our clients to each other because we've built trust through ongoing, online relationships with each other by blogging, comments, and private messages back and forth even though we're all in different states and provinces and might never meet each other face to face.

digital colleague by Janet D. Patrick January 9, 2009