Comic book character. Alter ego is Tony Stark

Originates from Hawaii, the "hawaii Ironman" is the hardest one there is and qualifying for it can be as difficult as finishing the race itself.
An "Iroman" is a triathlon event( see triathlon)which takes all three disciplines(swimming,biking and running) to extreme levels. The event starts with a 3.8 km swim, then going on to the 180km bike and the marathon(about 43km)run.
There is no break between these 3 sports which is what makes it so hard. That and the intense distances. There is a time limit for each event. The swimming time limit is about 2 hours and 20 minutes.
The best usually take about 8 hours to finish an Ironman, the worst will take over 16 hours and some might even have to drop out or risk severe injury and in some cases, death.
It is hard to get into an "Ironman" event, and preparing for one can take years depending on the individuel. Those who participate and finish get a t-shirt which they can proudly wear post-race.
Triathlon and the Ironman are growing in popularity.

IronManning is the act of performing male on male anal. Both males then ejaculates, pisses, shits, cries and vomits while another 3rd male sits back also ejaculating, pissing, shitting, crying, vomiting and filming. It is known as IronManning because you release all firearms

When a man get a piece of metal and put it in the anal hole it will make gaping and then starts to bleed then the guy continues to lick it then vomiting it on the girls back

While getting a blowjob you bust a nut in the chicks mouth, then slam a magnet to her braces making her swallow.

a man who's erection can be repeated a great number of times...

Eat a girl out when she's having her period

having sex that prolongs an hour

In close reference to "superman", ironman is when a man gets upset with his female companion for not having sex with him and cums all over her body, wraps her up in alluminum foil, and lets it dry so that she looks like the super hero; Ironman.