The phrase is also expressed when two or more heterosexual males have sexual relations with each other for a period of time, due to a lack of females or being un-able to maintain or acquire female(s) for a period of time, due to being in a Islamic or where homoseuxality is considered immoral states such as; Saudi Arabia, India, Pakistan], Afghanistan, Bangladesh, Sri Lanka, and all of the Arab speaking nations where contact with females is limited, and homosexuality is a crime under sharia law (Islamic law) adulatory is punishable by death only if its between a man and a woman. Committing the act of homosexuality is also forgiveable if one asks for forgiveness from god/Allah which is considered similar (symbolically) to the term nohomo.
lulz even allah forgive you if fuck a man and then say nohomo!
this explain it all then i guess:
http://www.youtube.com/watch?v=hCYRt78zUWY