n. 25B6; verb
their yacht bobbed about : MOVE UP AND DOWN, bounce, toss, skip, dance, jounce; wobble, jiggle, joggle, jolt, jerk.
the bookie's head bobbed : NOD, incline, dip; wag, waggle.
the maid bobbed and left the room : CURTSY, bow.
25B6; noun
a bob of his head : NOD, inclination, dip; wag, waggle.
the maid scurried away with a bob : CURTSY, bow, obeisance.