the in thing

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the (in) thing

The newest, most recent, or most current trend, fashion, or style. Deep V-necks are becoming the in thing for wedding dresses lately. Smooth, edgeless bodies are the thing for smartphone designs these days.
See also: thing

the in thing

That which is currently (and usually temporarily) fashionable or trendy. Haven't you heard? Wearing knee-high socks is the in thing now!
See also: thing

the in thing (to do)

the fashionable thing to do. Eating low-fat food is the in thing to do. Bob is very old-fashioned. He never does the in thing.
See also: thing

in thing, the

see under the thing.