The guys shoudlnt have been dicks. The OP didn't know what the callout meant, so they should've just explained to him and then there is one more player with extra knowledge to help him later
First my reply to the OP is that using teamwork is not being a tryhard. Any good team communicates, if they didn't they would be crushed by any team of similar skill level that did.
Now onto my reply to the quote:
It doesn't exactly sound like he asked in an appropriate tone or manner, he could've done without the cussing seeing as he should have asked it in a friendly/curious way. To me it sounds like he said it sarcastically, or rude if you will, I have no proof of this but one can only speculate on which of them was being the rude one and their reply leads me to believe my assumption is correct.
Also I use callouts and I don't see how you can expect me to explain what all my callouts mean to the entire team before every match, that's ridiculous. If you can't understand my callouts then they aren't meant for you, they are meant for the experienced players who can do something about whatever I'm calling out. Though if I was asked politely about an iffy callout such as said banshee spawn, I would of course explain, as any friendly and social person would.
[Edited on 04.16.2012 6:45 PM PDT]