radian

a unit used to measure angles. 1 radian is the angle in a unit circle where the radius is equal to the arc. since pi radians=180 degrees, radians are usually expressed in terms of pi.

This angle measures pi/2 radians(90 degrees).

by 5'1"Racer June 12, 2005

radian

a small fit girl, usually a box of rocks. easy to get along with. A simpleton kind of girl.

Guy: wow radian is so tight
jealous girl: she is a simpleton
guy: what is that

by TheRealHunter March 7, 2016

Radian Mode

1. a state of being where the person in question tends to fuck up or mess things up very badly

2. a common excuse used to justify seemingly retarded actions

Student: "Of fuck i got the wrong answer again!"

Teacher: " Hey homie make sure yo' caclucatin' device ain't in radian mode!!"

Person 1: "Damn dat nigga done fucked up real bad. He be goin to jail fo' 15 years fo' murder. What da fuck was he thinkin??"

Person 2: "Naw dude it wudnt his fault. He was in mutha fuckin radian mode!!"

by Redsoxfan1792 November 2, 2009