For those who don't hail from Essex, as iMac does, it's a compound of I'm a cunt!!
The Original iMac Hunt is a renamed Keano, who got tired of the comparisons with ex-Man United leg-end Roy Keane, even after a different Keane had signed for Tottenham Hotspur.
Inventive pun and online persona of iMac Hunt.
When Timmy and I were at ICHS we had a Maths teacher named Mr Hunt. We imagined his first name to be Uruk Hunt or possibly Gray Dick Hunt.
"Because imac hunt, obviously"