bell end

noun5

1. •
   The flanged end of a pipe

   • To make a storage place for a watering hose, bury a length of wide pipe bell end up. — 1948
2. •
   (vulgar, offensive) A stupid or contemptible person.

   • I don't care who he is: he's acting like a bell-end.
3. •
   (slang, vulgar) The glans penis.
4. •
   The end of an internal combustion engine that has the bell housing and by extension that end of the crankshaft
5. •
   The protective device around the valve of a gas cylinder