You have a significant other, and also have a strong friendship with someone else. The relationship has strict boundaries to remain as a friendship. However, instances occur, which could be perceived as more than "just friends" behavior.
Jane was dating Dave. Dave neglected Jane. Jane met John. John and Jane became "friends" and proceeded to blur the line, when drunk, between being friends and more.
by bettermoments February 2, 2009
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A reference to snorting cocaine. When a user uses a rolled dollar bill, he/she has to lean in close to snort a line of coke. Human eyesight generally starts to blur at a distance from the eyes of 6 inches. Using a bill requiers a user to get within 4 inches of the coke line, thus, the line is blured.
Tonight my friends, we blur the line.
by Ambiguity September 14, 2007
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A commonly used expression to reference a situation where things are ambiguous or unclear. Sometimes meaning "to push the envelope" or test the boundaries of acceptability.
"So what's the situation with that guy you met?"

"It's kinda blurred lines, we're not dating, but we're more than just friends with benefits."
by Cupeco August 17, 2013
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Rapey song by a guy who likes to dress as beetle juice.
Tom: Dude sorry I stunk up your bathroom I just took a massive Robin Thicke.

Ed: Damn Robin Thicke is a good term for taking a shit, that smell makes me see blurred lines, just as awful as the song is
by MrHobbes69 June 26, 2014
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The "lines" are personal boundaries a person designates in his/her sexual life. They usually only appear "blurred" to men who don't comprehend the meaning of "no."
Girl: "Hey, I don't think I feel comfortable with that."
Robin Thicke: "Just let me liberate you... I know you want it... I hate these blurred lines."
Girl: ".....Creepy."

Gay guy 1: "I don't know if I'm ready for that."
Gay guy 2: "You invite me over, and now you don't want to hook up? Gosh, what's with these blurred lines??"
by tankini August 17, 2013
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The nonexistence/shadiness of the lines between right or wrong, particularly in sex. As heard from Robin Thickle's hit song by the same name.
"Is that even legal what you are doing to me?"
"Baby, these are blurred lines."

"I'm a good girl!"
"I'm a bad girl!"
"Whatever, these are blurred lines."

"This music video is so sexist."
"Blurred lines."
by AccidentalTease August 18, 2013
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when one person makes sexual advances on another person (at times they are drunk), and the other person (trying to be kind about it) tries to back away from the others' advance. the blurred line is in the mind of the aggressor.
Troy was really pressuring me into having sex, but he didn't get the fact that I wasn't interested and crossed the line. To him they were blurred lines.
by troy valency August 25, 2013
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