meaning something is extremely bad/sucky, derived from the words suck and delicious. Meaning that the unfortunate events/things are so bad that they would be delicious.
There is only one homo sapien on earth who is truly SUCKALLISCIOUS in my opine - Master Jeff Wielandt. I'd sell my soul to suck on his SUCKALLISCIOUS skinfoot Every Day and Night, Evening and Morning, Breakfast and Supper - I'd take it all down !
suckalicious: to catch something or someone in the act of being really intensely mediocre or boring and have to continue watching due to obligatory reasons.
that cornywedding was totally suckalicious... their vows were painfully forced... and i fucked the groom on his bachelor party.