the.com/sugar snap pea

means An edible-podded pea you eat whole, pod and all, prized for its crisp snap and sweet flavor unlike shelling peas or flat-podded snow peas.

from The 'snap' names the audible crunch of the crisp pod when bitten, while 'sugar' flags its sweetness. The variety itself is a 20th-century breeding achievement — developed by crossing snow peas with garden peas to get a pod that stays thick, tender, and stringless instead of flattening out, letting growers finally combine sweetness with crunch in one pea.