Something that's funky has a strong musical rhythm or beat, and a deep bluesy sound. You might practice some funky bass lines before auditioning for your school's jazz band.
Funky tunes have some of the spirit of the 1960s-era music genre called funk, a branch of R&B that's influenced by soul and jazz music. Rhythm is so important in funky music that the drums and bass are emphasized, melody less so. Based on this cool music, funky also means "stylish" or "hip:" "Mom, those pants are totally funky." The word's original meaning, however, was "stinky," specifically when discussing the smell of aged cheese.