Emulated a bobblehead

• Signaled agreement
• O.K.'d silently
• Caught a wink
• Dozed off
• Signalled agreement
• By playing three of diamonds one indicated support
• Indicated assent
• Signaled approval

WordNet Word definitions in WordNet
n. a sign of assent or salutation or command the act of nodding the head [also: nodding , nodded ]