cradle-snatch verb to have a sexual relationship with someone much younger than yourself UK,1938 The image of the partner as a baby.
The crew would think I’ve gone in for cradle snatching. — Frederick Kohner, Gidget, p. 98, 1957
The women, he meant. Too fucking young for the most part. Even the ones where it wasn’t out and out cradle-snatching[.] — John Williams, CardiffDead, p. 109, 2000