noun, masculine/slo/plural: slows
slow is masculine in French.
waltz (slow waltz, English waltz)
“J'aurais pu jouer à la Sophie Marceau ¶ J'aurais pu tomber dans tes bras pour un slow” — I could have played the Sophie Marceau ¶ I could have fallen into your arms for a slow waltz
Pseudo-anglicism, derived from slow.