2.0 

(Read: two point oh | two point zero)

Marketing catchphrase/buzzword than, when attached to a name, implies an "improved" or "superior" product than it's predicesor.

When used in comparisons like ' A is B 2.0" ,' it's like saying "B" is like "A" only "better."

SUVs are station wagons 2.0.

George Bush and Osama bin Laden think they're Jesus Christ 2.0.

2.0 by Man Machine August 15, 2007

2.0 Boys 

Hip-Hop group made up of Eminem, Slaughterhouse, and Yelawolf.

Young Money was never shit, those 2.0 Boys coming strong.

2.0 Boys by Rap Einsten April 7, 2011

a laugh and a 0.5 

Internet/IM speak for a laugh and a half, meaning something is mildly amusing. Substitute for a higher fractional number if the situation calls for it (i.e. a laugh and a 0.7).

Person 1: Did you see yesterday's episode of The Daily Show? It really was a laugh and a 0.5.

Person 2 appears to be offline.

a laugh and a 0.5 by Anouska DS February 24, 2009

16-0 

To have a tremendous run of great skill and/or luck, before messing up later on.

Nick: Jamie Lynn Spears had everything going for her man.
Josh: Yeah, she went 16-0

16-0 by Ben McLaky January 11, 2008

5.0 

In 1982, Ford reintroduced a high-performance Mustang GT which opened the door for an entirely new era of the muscle car. Wringing a then-respectable 157 hp from its "5.0" (actually 4.94 L, 302 in³) Windsor V8.

The "5.0" Mustangs, cars that gave birth to an entire aftermarket performance industry, continue to remain extremely popular today.

Pronounced "five point oh."

Vannilla Ice: "Rollin' in my 5.0 with the ragtop down so my hair can blow"

5.0 by Van Buren January 26, 2006

2.0 Girl 

A girl who is worth ditching time you should be using to study for a test, doing HW or getting sleep but instead you go over to her dorm or house to hangout with her or get busy, Risking your 4.0 GPA for a 2.0 GPA

Guy 1: "Yo you see that girl right girl definitely a 2.0 Girl
Guy 2: " Yeah I would lose sleep and skip out studying for my finals for her
Guy 1: "But that's your future dude"
Guy 2: "I'll do anything for here even losing my 4.0 GPA for a 2.0 GPA

2.0 Girl by NotHillary September 13, 2016

5.0 Coyote

Engine in 2011 and up mustang gt. Put a 2.3 TVS blower on it and its faster than Bill's ZL1.

Even with a built ls3, ported heads, blower, full exhaust, tune, and 75 shot, Bills ZL1 couldn't fend off non liberal's 2013 5.0 Coyote Mustang.

5.0 Coyote by Balzdp October 1, 2013