IFSY means: This stands for “I’mma Fucking Spock You.” This is a common way to vent anger at the actions or ignorance of another person in chatrooms. Useful in conjunction with “slap” and “punch”. (in Community Dictionary, added by Caitlin Cline)

What else does IFSY mean?

  • A young female who self-identifies heterosexual is an ifsy. However, she might be able to have a relationship of some significance with another woman under certain circumstances. A bi-curious girl may be more interested in an ifsy than a girl who is just casually interacting with another girl. (in Community Dictionary, added by Ismael Santiago)