Gosh, back in Grade 4 we were told what "Cockroach" (la Cucaracha) was a slang word for in Mexico. No one cared. It was a fun song!

The end of the chorus, loosely translated, is how the little critter can't find any Mary Jane to smoke.

Maybe they should write a couple of extra verses about Cucaracha going into rehab, and that would make everyone happy?