MLIAFMLCL translates literally to "My Life Is Average, Fuck My Life -- Clown Love."
It is a joke at the expense of Juggalo (ICP) culture, parodying their catch-phrase MMFWCL (Much Mother-Fucking Wicked Clown Love)
With a quick glance, most juggalos will interpret this phrase as any other normal declaration of clownlove (mmfwcl), allowing hilarity to ensue.
Person 1 -- "I love Insane Clown Posse. Their lyrics really speak to me as a rebellious teenager with access to side-mounted hatchets."
Person 2 -- "Fuck yea, fuck the bozos -- MLIAFMLCL."