"That shit is bananas"
When someone at work comes back with some random IT shit I've never heard of: "Yeah, because that's a thing, right?"
"Cool beans"
"No worries"
When doing some tech work, do all I can do, and tell a co-worker to reboot and see if it works, and they insist on me staying in their office to see: "It's either going to work or it isn't, I have no more ideas for fixing this, why am I still troubleshooting this bullshit?!" - I must say this to myself 2-3 times a day. Fucking office is plagued with bad hardware.