old school 
noun
Used, usually approvingly, to refer to someone or something that is old-fashioned or traditional: he was one of the old school of English gentlemen...
- He was an actor of the old school, his voice capable of uncommon levels of thrilling timbre.
- The artists of the old school, in particular the sonata playing of Glenn Gould and Yehudi Menuhin.
- Though politically an old school Tory, Howard Senior came to believe the British had got it wrong.
adjective
1Having or adhering to old-fashioned values or ways: the restaurant is an old-school brasserie of the Parisian model...
- Maybe leather trenchcoats and old-school country values are too much of a mismatch.
- Reyes is old-school but not old-fashioned, and has a keen sense for the highs and lows of a jazz tune.
- When Bernie falls in love, the chips in his life begin to fall into place, just as cards begin to get stacked against Shelly and his old-school values.
1.1Denoting or relating to a style or genre of popular music, especially rap or hip-hop, regarded as traditional or relatively uninfluenced by newer styles.This is old-school, pastiche hip-hop, right down to the James Brown samples....
- Once they signed her, however, Uptown was unsure how to market Blige, whose music straddled the genres of modern hip-hop and old-school soul.
- For the sound effects, Namco has opted to use old-school style sound bytes from previous Pac-Man games, along with the normal ones.