A person who is annoying, always getting in the way, holding things up, or just plain stupid.
Comes from the dictionary
definition of the word that is a
block that you put under
wheels to stop them from moving on cars or airplanes.
Can be used as a noun (you are a chock) or a verb (to chock)
Come on, stop being such a chock, we need to
leave now!
Jimmy really chocked us last
night when we wanted to go to the movie and he wasn't ready