The idea that a person will be close to a significant other until something tears them apart. After what is usually a few years the two people will meet up again and be attracted to one another. Such as a boomerang leaves but comes back.
Friend 1: "John started seeing Claudia again; its been 4 years since they were together."
Friend 2: "I told you the Boomerang theory was real!"
Friend 2: "I told you the Boomerang theory was real!"
by Toichiro October 14, 2014
Children who move out of their family's house, purportedly to get jobs and/or start their own lives, but who return shortly thereafter to live with their parents again.
As the cost of living increases and jobs become harder to find, more and more parents find that instead of having an empty nest, they have boomerang children living with them.
by Sparky McSparkerson June 12, 2008
"Hey did you see Tom at that meeting the other day? He was eyeing Natalie." "Yeah! The dude was going full boomerang."
by Parker Brooks November 9, 2013
When a male is getting a blow job from the side and his penis pulls out and smacks back like a boomerang comes around and smack the giver.
I was getting a blow job while driving and my cock kept giving Missy a boston boomerang to the side of her face.
by Devilwear.com January 11, 2011
by TOPHman5000 June 13, 2020
When someone is fingerbanging a female in the vagina and moves down to fingerbang the anus and then moves back to the vagina.
by Charleswood September 1, 2020
A sin boomerang is a woman of the attractive variety that is able to be recruited to acquire various objects of the self-destructive variety (such as drinks or cigarettes) from horny men typically in an environment in which imbibing is occurring. Upon acquiring the desired item, she then returns to her friend/friends to ration out the spoils.
"Dude, that party would have sucked without a sin boomerang. Those guys were being mad stingy with the Bacardi."
"Don't give that chick any cigarettes, she's definitely a sin boomerang."
"Don't give that chick any cigarettes, she's definitely a sin boomerang."
by BCKittyCat September 29, 2009