What is Chicken Slacks?
1.
A misheard lyric in the Sam Cooke song Twisting The Night Away.
"He's dancin' with the chicken slacks"
the actual lyric is:
"He's dancin' with the chick in slacks"
Back in the early 60s it was unusual to find a woman wearing pants at a social event - usually women wore skirts or dresses.
See