A former prime minister, Ayad Allawi, is a Shiite with humongous support among Sunnis.
And much of what could be a humongous tab will be shouldered by taxpayers.
also humungous, by 1972, American English, apparently a fanciful coinage from huge and monstrous.
Very large; gigantic: a humongous chain
[1960s+ Students; perhaps a sort of echoic-symbolic blend of huge with monstrous]