Can someone I'd it?

Edit: location is north eastern United States

Can you give us your location?

Might be ambrosia trifida...
Might be castor bean.
Might be cleome.
Agree with need for location, plus.... Additional pics.

It's somewhat like Japanese hop, Humulus japonicus:

https://www.nps.gov/plants/ali...

I'm thinking Cleome.

Cleome (apparently now Tarenaya) has separate leaflets, whereas the ID plant has lobed leaves:

I am thinking Japanese hops, too. Do all the surfaces have short bristles that make it stick to things (and you)?

Too bad it is not a variegated form

Leftwood said:I am thinking Japanese hops, too. Do all the surfaces have short bristles that make it stick to things (and you)?

Yes, its very prickly. I think you nailed it. Does this plant flower?

There are male and female plants of this reseeding annual. Male flowers are the showiest, but inconsequential, in my opinion. Females produce small hanging hops very late in the season, reminiscent of beer hops but not showy, just interesting.
Male flowers head, 5 inches tall:


I grow the variegated form, but I don't see any use for the green one, unless you just want a very fast growing vine cover.