Definitions:
make a quick, short movement up and down

a quick, short movement up and down

a style in which the hair is cut short and evenly all round so that it hangs above the shoulders

a weight on a pendulum, plumb line, or kite tail.

a bobsleigh.

a short line at or near the end of a stanza.

cut (someone's hair) in a bob

ride on a bobsleigh.

a shilling.

a change of order in bell-ringing.

bolivian boliviano(s).