>>18068952When its implied something would be otherwise ironic, you specify that is unironic to remove the frame of irony one might otherwise assume.
"This show sucks"
"Dude, that show is one of the best things i've watched"
"This show sucks"
"Dude, that show is unironically one of the best things i've watched"
There could be a meta ironic implication to this of unironically being used ironically