Octopus - This is an eight legged sea creature which is the subject of many myths and sea tales. The octopus can be depicted as fearful or as a passive almost feminine creature. As such it is more common for women than men to get tattooed with an octopus.
Om - The Om symbol is a depiction of the primeval sound believed by Hindus to be the 'breath of God'.
Omega - This is the last symbol in the Greek alphabet but can also mean 'the end of all things'.
One Percent (1%) - This came from a quote from the American Motorcycle Association which claimed that only 1% of its members were gang members or outlaws. Some biker gang members proudly wear this as a mark of honor.
Oni - This is a horned devil in Japanese tradition and a popular style of tattoo.
Orchid - Orchids are a popular choice of floral tattoo mainly because of its beauty and its rich associations.
Osiris - King of ancient Egypt and often depicted as a mummy holding a staff. He was the god of fertility but also linked with the afterlife.
Owl - Owls are a popular choice of bird tattoo because of their meaning. Owls are striking birds with hypnotic eyes and are known for their wisdom.