Everyone has a few foods they've never tried in their life.
For Lunchbox, one of those foods is cucumbers. While he was in Las Vegas, he saw a waiter walk by with some samples of things. One of those items looked really good, it was a cucumber salad. Lunchbox had never eaten cucumber before, but the salad looked good so he decided to try it.
Unfortunately for cucumbers, Lunchbox said he can "take it or leave it." He only gave cucumbers a 1.5/5 rating on the scale of eating things. Though he does really love something in the cucumber family, pickles. Those he believes are great and he will continue to eat them by themselves.