The crude bomb cartoon used by Israel's Prime Minister Benjamin Netanyahu at the UN General Assembly to highlight his fears over Iran's nuclear ambitions has triggered a wave of mockery on the internet.

Netanyahu unveiled the childish drawing of a bomb, complete with lit fuse and red line, to alert the General Assembly to his belief that Iran would have enough enriched uranium by summer 2013 to make a nuclear bomb.

"The hour is getting late, very late," he said, warning the diplomatic audience about Iran's nuclear progress.

Despite the seriousness of the message, the way it was conveyed resulted in Netanyahu being mocked and parodies soon started appearing over social media under the tag "Bibi [Benjamin] Boom".

In many of them, Israel's hawkish prime minister is depicted as a character from a Warner Bros cartoon.

"Netanyahu's bomb cartoon is the Middle East equivalent of Clint Eastwood's chair," tweeted The Atlantic's Jeffrey Goldberg.

"Netanyahu 's bomb last seen in a Wile E Coyote cartoon.

"Acme [the ubiquitous manufacturer of the studio's cartoons] may be active in Iran, according to Netanyahu chart at UN," wrote Benjy Sarlin ‏

"Netanyahu has reduced nuclear war diplomacy to cartoons and markers," said Sam Stein.