Wiktionary
first slip
n. (context cricket English) The slip fielding position closest to the wicket keeper
Usage examples of "first slip".
On the other side of the water there had been a fresh fall, and a solitary old willow, its roots partially stripped by the first slip, had heeled over and fallen athwart the brook.
At the head of the line of cars near the first slip Dunross stopped beside his car and opened the door to the backseat.
Then the under-kimono, then the first slip and the second, and then the loincloth.