The amount of abuse you can take before you "Go Hulk", or explode with anger. Often used when describing what someone else did.
"When one of the younger soldiers was shot through the head and killed, Jones finally reached his Hulk Quota." - Direct quote from cracked.com.
Did you see Timmy yesterday? He's always been so sweet and forgiving, but when Dennis punched him in the face, he reached his Hulk Quota!