I'm guilty of things like this:
Friend: "Here, look at this [strange object/picture]."
Me: "That's [negative adjective]. And by [negative adjective], I mean VERY [negative adjective]."
And overusing words and phrases as such: fantastic, spiffy, cool beans, all-raaaht (stolen from Henry of "Without A Face"), okuui (also stole from Henry), right-o, okies (GOD WHY), and WRRRRRRRRYYYY. I blame the folks who I sat with for lunch both this year and last for that last one.
I also lapse into the voice of Portal characters, namely, the turrets, GLaDOS, and the Curiosity Sphere.