to screen a call is to look at the caller
ID of an incoming call and decide whether or not to
answer it.
to have your call screened is similar to being
side buttoned
mary:
hey your phone's ringing who is it?
sven: (looks at phone) oh my gawd it's my cokehead ex.
mary: eeww you don't want to talk to him. screen that shit.
sven: yeah no kidding. (presses ignore) scrrrrrreenin that!