look up any word, like darude - sandstorm:
 
1.
When you've been doing something self destructive for some time (perhaps without realizing it) before something serious happens that forces you to come to terms with what you've been doing and that you need to stop.

Usually involves something medical but can involve anything serious.
He used to eat tons of junk food, stuff with all sorts of sugar, salty snack foods, you name it. It doesn't help that he rarely exercised. He didn't seem to get that even the manufacturers of those foods stress the importance of a balanced diet. His wake up call was a heart attack that almost killed him. Fortunately, he took it seriously and made a lot of changes to his lifestyle.

They used to seem like they had everything. They lived well beyond their means. Most people thought they were rich. It took almost losing their house for them to start opening their eyes and living within their means. It was a real wake up call.
by Optimist with experience April 13, 2009
 
2.
an event so dramatic or troubling that it effectively serves as an alert, reminder or call to action
The failure of the ongoing efforts to produce effective solutions should have been a wake up call to stop arguing.
by The Return of Light Joker September 06, 2009
 
3.
Oral sex between 6 and 8 a.m.
Everyone deserves a wake up call...
by skorpionlady August 12, 2005
 
4.
In the morning, or anytime of the day, when the victim is taking a shower you go into the bathroom and take a large smelly shit and then flush the toilet. By flushing the toilet, the water temperature changes causing the victim to run out of the shower and smell the stench filled air. Best done in the morning, hence wake up call.
6:30 AM
*flush*
Roy: Ahhh ahhhh cold cold, *cough* *cough* *gag* *gag* what the...damn it.....MIKEY!!!!!!!
Mikey: Hahahaha wake up call!!!!!!

Manager: Why are you late today Duncan?
Duncan: Sorry it's too obscene to mention
Manger: What?
Duncan: I stayed the night at my friend's house and he gave me a wake up call.
by window shopper June 20, 2011
 
5.
a surprise and swift insertion of your hog leg into a friends mouth mid-yawn.
1.

Man (to friend): oh, am i keeping you awake? you better not yawn again or you're getting a wake up call.

2.
Friend (yawning): aaaaaaaahhhhhhh...AHH!!!
by johnnyg11141983 March 18, 2010
 
6.
You need find a random house, silently break into, locate random target, preferably female. When the target has been found, the aggressor then will be violently slapping with willy a victim over a face while she is sleeping. You are slapping her until she will wake up while singing "wake up call."
(Hotel reception, boss): "Do not forget to make a WAKE UP CALL in the morning!"
(Receptionist): "Do not worry, they will ake up with gladness!"
"You've just unleashed a WAKE UP CALL!"
by Peter Vyzinkar September 24, 2008