What does Snakes in a dream mean?

A Snake in a dream can represent:
Male sexuality
Trickery and cunning
Knowledge
Snake in the Garden of Eden represented sin/evil
Lookup the charateristics of the particular type of snake that was in your dream.  That may give you clues for an acurate interpretation.
What type of Snake was it?
Ex.
King Cobra - one of the largest venomous snakes in the world, often associated with being 'hypnotised'
Python - known for squeezing their prey to death, one of the largest sname in the world

See also 'Anaconda'