Definition of donk bet, and infinite aggression?

A couple of questions for you guys....

First, what does infinite aggression indicate in a heads-up display? Is it used only when an aggression factor can't be accurately calculated? I'm never sure whether to take it to mean a players is very aggressive post-flop, or not aggressive at all, but it seems to appear most often when only a few hands have been played and before more data is available.

Also, what's the definition of a donk bet? Is that when you bet out of position on the flop when someone else is the preflop raiser?

An infinite aggression factor means postflop he has never called, he has either bet, raised, or folded. It doesn't neccessarily mean he is crazy aggro, because he could have bet once or twice and folded like 10 times.

Your definition is correct

I always called the "donk bet" a "weak lead"...
Think of aggression factor as actions other than calls-- someone with an infinite af has NEVER called.

OK, thanks guys!

In my eyes a donk bet is someone who bets with crappy cards pre post or whenever and gets lucky someway somehow for example yesterday in a homegame my dad made a donk bet called my 3x big blind raise with a 9 3 off suit flop came... K 10 3... i had pocket aces so knowing hes the king of donks and he calls with anything i raised all in ...what do you know he calls...turn comes and what is it a forkin 3 followed by a 9 on the river!!!!lol it was a 5 dollar game so its all good I GUESS