cross (one) (up)(redirected from cross them up)
cross (one) (up)
To defy, challenge, or frustrate one. Don't cross that guy if you want a job in publishing—he's a celebrated editor. Stephen has crossed me up so many times I just can't trust him anymore.
See also: cross
to oppose someone. You best not cross Jim. He has a very bad temper. This is the last time you cross me, you hear?