A nickname to suggest one (a male) is very into having sexuall
thoughts about other men. Can also be used to say that a certain male has a
fetish for one particular name, and will tend to have sex with people with
this name.
You think one has
gay thoughts about men, you then call them "Tomo".
If one tends to
spade and
have sex with girls only the same name. For example 'Hannah', then you call them "Tomo".