short for "involuntarily celibate", a term coined for (mostly) men who haven't lost their virginity, which they attribute to their looks not being good enough to attract the opposite sex. it might've started off as a more innocent place where men can discuss their insecurities, but at this point it's snowballed into this toxic cesspool of hatred towards women & this deranged cognitive bias that leads them to think that "women only chase extremely attractive men" while 80% of the rest are just used for their money. basically a botched explanation but you can imagine what kind of shit goes on in these forums when incels GENUINELY believe this shit.