Top Definition
Old School Must Listen - a way of saying these are the founding fathers of the music you listen to today and that you should give them a listen to see where it came from
jef: lil wayne iz so siiik
tom: tupac is OSML

geoff: blink182 r soo rad
thom: sex pistol are OSML
by dangerousPINK June 16, 2012

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.