When you piss or spuge in a coffee cup or mug of a co-worker, dump it out, and put it back where you found it. Taking a picture of the whole incident really adds to the effect when the co-worker finds out the next morning during coffee break.
Tom was really pissed when he found out I gave his mug a Devastating Dana.
Dana day-na - noun - A man with a female name, who can take it up the ass like a trooper. Often posing as a heterosexual male in their early to mid forties, "Dana" acts extremely "manly", some would say too much. "Dana" is actually quite soft and gentle, loves to cup the balls while stroking the shaft, and guzzles all the cum down, never missing a drop.
Dana's are almost always Dallas Cowboys fans, as they see them as a "manly" team, that sucks... just like Dana.
"Check out that dude in the Cowboys Jersey, obviously named Dana, acting all cool and funny, but really wants a cock in his ass."