What is In The Swim?
1.
A phrase used in the 1940s or 1950s to refer to fashionable items, places, people, etc. Something that is currently popular or trendy.
Tween: Granny, my friends and I heart the Macarena...it is so totally cool!
Granny: Perhaps hun...in my day, the Charleston & the Jitterbug were in the swim.
See