Rosie, at age-I dunno, but like, three or something-broke out with the following chorus for no apparent reason one day:

Homicidal drifter, drifter, drifter

Homicidal drifter, yeah yeah yeah!

Later efforts to expand the song with Nick and Renee resulted in the following opening lyrics:

Cruising down the highway, singing highway songs

The radio’s turned up and the drifter sings along…