get the nod, have the nod, give someone the nod

nod:

Fig. someone's choice for a position or task. (*Typically: get ~; have ~; give someone ~.)

• The manager is going to pick the new sales manager. I think Ann will get the nod.
• I had the nod for captain of the team, but I decided not to do it.

get the nod: to be approved or chosen for something

• Martinez got the nod from the manager to be the starting pitcher in tomorrow's game.

Etymology: based on the literal meaning of nod (to move your head)

... http://idioms.thefreedictionary.com/nod