Libido is the fourth album by the American ska punk band Buck-O-Nine, released in 1999 on TVT Records.

[4][5] The album marked an attempt by the band to broaden its traditional ska punk sound.

[6][7] The Hamilton Spectator wrote: "Mixing trumpets and trombones with hurry-up snare shots and scratchy guitar breaks, Buck-O-Nine prove that ska's hyperkinetic zeal still sounds pretty good when it's matched with a wry, knowing wink.

"[3] The Calgary Herald thought that "if you live and die by the sound of suburban pseudo-angst with a tight horn section, this is manna from heaven ...

If you're living in 1999—heck, even 1998—this already sounds nostalgic.