Hombres

It was a catch-phrase that became a big hit... "Let It Out (Let It All Hang Out)" went to #12 in 1967 for the one-hit wonder band from Tennessee, The Hombres.  More of a novelty song than a music piece, the song has appeared in movies and television ads a number of times over the years.  Today it's mostly just a forgotten oldie.
check the song out here