An expression originated from the 1982 hit "1999" by Prince, it was originally used to mean "to have the wildest party of your life", like you would if you were to celebrate the opening of a new millennium.
It became obsolete after 1999, so, if now you express your intentions to "party like it's 1999", people will believe you want to celebrate by listening to music like "La Flaca" and "Mambo Number 5", cracking jokes about Monica Lewinsky, playing with a Playstation 1 and talking about The Matrix like "OMG TEH BEST MOVIE EVAR!!!111"
It became obsolete after 1999, so, if now you express your intentions to "party like it's 1999", people will believe you want to celebrate by listening to music like "La Flaca" and "Mambo Number 5", cracking jokes about Monica Lewinsky, playing with a Playstation 1 and talking about The Matrix like "OMG TEH BEST MOVIE EVAR!!!111"
Before 1999:
Joe: Come on, dude, let's party like it's 1999!
Bob: Yeahhh!!!
In 1999:
Joe: Come on, dude, let's party like it's 1999!
Bob: WTF? It IS 1999!
After 1999:
Joe: Come on, dude, let's party like it's 1999!
Bob: Nah, I'm not into this nostalgia stuff.
Joe: Come on, dude, let's party like it's 1999!
Bob: Yeahhh!!!
In 1999:
Joe: Come on, dude, let's party like it's 1999!
Bob: WTF? It IS 1999!
After 1999:
Joe: Come on, dude, let's party like it's 1999!
Bob: Nah, I'm not into this nostalgia stuff.
by Altered Reality March 3, 2010
Get the party like it's 1999mug. A culinary term used in kitchens by cooks. It refers to something tasting awful or a recipe / dish not made skillfully!
Cook- Chef try my sauce for today's feature!
Chef - Seriously - that tastes like ass! Make it again...
Chef - Seriously - that tastes like ass! Make it again...
by Cooks Like a Chef January 21, 2013
Get the Tastes like ass!mug. not looking for a relationship, just a good time. just wanting to have fun and not be tied down to any one.
the song like a guy helps explain it a little bit.
the song like a guy helps explain it a little bit.
by kristen paige August 7, 2007
Get the dating like a guymug. PLAS for short.
An awesome party exclusively for La Canada High School Seniors. It's held right before school starts in late August. Everyone wears their Senior T-shirts and gets PLAStered.
It's the first party of the year, and sets off Senior year with a great vibe of class camaraderie. It is rumored that several unexpected hook ups occur at this party.
There is also a Party Like A Second Semester Senior.
An awesome party exclusively for La Canada High School Seniors. It's held right before school starts in late August. Everyone wears their Senior T-shirts and gets PLAStered.
It's the first party of the year, and sets off Senior year with a great vibe of class camaraderie. It is rumored that several unexpected hook ups occur at this party.
There is also a Party Like A Second Semester Senior.
Senior 1: "Are you going to Party Like A Senior?"
Senior 2: "You mean PLAS? Hell yeah I'm going! VIVVAAA!"
Senior 1: "Cool. I heard it's going to be awesome. Remember that it's only for LCHS seniors. Don't be dope inviting those CV kids..."
Senior 2: "You mean PLAS? Hell yeah I'm going! VIVVAAA!"
Senior 1: "Cool. I heard it's going to be awesome. Remember that it's only for LCHS seniors. Don't be dope inviting those CV kids..."
by seniorsrock February 24, 2011
Get the Party Like A Seniormug. A phase to describe to a person who flashes around a new gadget or phone, often in an arrogant and selfish manner. i.e. like a second cock.
by Dark lord232 December 26, 2010
Get the Like a second cockmug. 
Analogy to refer to someone who is sweating profusely.
Usually referred to one belonging the larger human group.
Usually referred to one belonging the larger human group.
by raarky April 20, 2004
Get the Sweating like a rapistmug.