To be sexually aroused by the same gender.
'Rad, man!' Meaning in essence, 'I want to dip my schlong in your arse dude.'
ayon kay Ubermensch ika-10 ng Abril, 2005
Ratchet and dirty. Those ratchet girls who are just nast as fuck
Damn,that girl that sits next to me is r.a.d. as fuck
ayon kay JoieG ika-28 ng Enero, 2015
something that is cool or awesome some times used as radical
wow that's rad OR that's totally radical (rad)
ayon kay h.m.l.cx ika-20 ng Disyembre, 2014
Several definitions given here are correct in connecting the term to radical but incorrect in the date of origin. Being old enough, I can attest that it was used at least as far back as the seventies.
"The Ninja Turtles never invented a single term. To suggest so is not rad but very uncool."
ayon kay sammmyz ika-01 ng Disyembre, 2014