Q.can anybody tell me what this plant is?
please can anybody identify this plant somebody said it was a weed

This is Euphorbia lathyrus Gopher Purge or Mole Plant. You can go to a web site I found for more information: http://www.mountainvalleygrowers.com/euplathyrus.htm

Looks kind of like an oleander to me. Any other guesses? You could probably get an ID from you friendly neighborhood master gardener -- this link will help put you in touch: http://mastergardeners.org.uk/get-involved/find-your-nearest-master-gardener/