That doesn't look like a cuke to me. Looks rather melon-ish. Or even some kind of squash. I can't recall ever seeing stripes on a cucumber. Other than that, I have no idea.

when i saw the fruit i thought it was a watermelon..(i've never grown one or seen one young) but the plant looks exactly like my cucumber

Maybe it's a misshapen zucchini! The leaves look cucurbit (spelling?) - not sure that's a proper statement but squash and cucumber leaves are similar in shape and this vine looks like that.

Are watermelons cucurbit?

The leaves on this one look very different from the leaves on my watermelon vine, though.