Verb:NOD

Nod does just that, the action of nodding: moving ones head down and up, sometimes once, sometimes multiple times, sometimes quickly, sometimes slowly, with a variety of facial expressions. Nodding can express many different emotions and is an excellent verb to be familiar with for roleplaying purposes.

Usage:
NOD [style] [target]

Where [style] is one of the following:
CURT    SLOW     GREET    RHYTHM     EMPHATIC    ENCOURAGE    
FIRM    AGREE    QUICK    SLIGHT     GRACIOUS    AGGRESSIVE    
GLUM    BRIEF    SLEEP    APPROVE    GRATEFUL    PERFUNCTORY    
GRIM    BRISK    TERSE    FERVENT    REASSURE    APPRECIATIVE    
MEEK    EAGER    VAGUE    KNOWING    SYMPATHY    ENTHUSIASTIC    
ONCE    FAINT    ABSENT   CHEERFUL   VIGOROUS    SATISFACTION     
SAGE    GRAVE    POLITE   RESPECT    RELUCTANT   UNDERSTANDING