Running into a church on a sunday and screaming "Jesus Christ is a fake and your all still going to hell"

Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed

statements / comments or writings
by a person that are considered to be
against the tenets of a religion or against general public morality.

Anything said or done that is considered uncool or against all that is good in the world. Any person that has commited a blasphemy is afterwards subjected to a blasphemy slap in retaliation.

what ignorant people call it when smart people try to explain things to them

Blasphemy is the act of insulting or showing contempt or lack of reverence to a deity, or sacred things, or toward something considered sacred or inviolable. Some religions consider blasphemy to be a religious crime. As of 2012, anti-blasphemy laws existed in 32 countries, while 87 nations had hate speech laws that covered defamation of religion and public expression of hate against a religious group. Anti-blasphemy laws are particularly common in Muslim-majority nations, such as those in the Middle East and North Africa, although they are also present in some Asian and European countries.

Saying something that goes against the teachings of your average great and holy moot point (see religion). Thought to offend god/s.