It could be from the name Boudica (or Boadicea or Boudicca) who was a queen of the celts and was the leader of the only army to ever defeat the Romans in battle. Eventually the Romans did defeat her andher army. She was captured and died by suicide of swallowing poison.
A type of water-stopping dam.
* It does NOT mean we can't find men... nor does it mean that we're BUTCH/masculine.
"How dare you think I'm straight! I'm a DYKE, you idiot!!"
Note: Dyke with a "y" is a lesbian. Dike with an "i" is for damming water.
Hell ya! And I am definitely not missing the Dyke March. Sarah and her girlfriend are riding in the Dykes on Bikes contigent.