Wearing a rear bicycle light in the same manner as one would wear a bow-tie. Light is generally attached using a clip to the collar. Light is switched on/off as desired. Must be flashing when on.
'I say Jenkins, that chap is sporting a rather fine clapham bow tie, what?'
'Eeey blud, set me your clapham bow tie. Also your phone.'
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.