The Reds skipper was incensed that Webb - who has just been selected to officiate at this summer's World Cup - failed to award his side a penalty in the final moments of last night's 1-0 defeat at Arsenal.
Television replays showed that Cesc Fabregas had handled Gerrard's goal-bound free-kick and the Arsenal captain later admitted the ball had struck his arm. Yet Webb waved Liverpool's appeals away, much to the squad's dismay, and Gerrard was still trying to work out how the Yorkshire official had erred so badly
'It was a penalty,' said Gerrard. 'The referee told the Liverpool wall in the first half that if anyone raised their arms above their waste he would give a penalty.
'So, for some crazy reason, he has not give the decision. He said to me he hadn't seen it. But it's unbelievable if a referee can't see someone raise their arms in a wall.
'He told the Liverpool wall 'nobody raises their hands'. Surely it's the same rules for Arsenal?
'Over the course of the season, sometimes you don't get decisions, other times you get decisions that you don't deserve.
'But something so clear like that - when a referee is looking straight at the wall - you would expect (to get) it. Certainly with Howard Webb.
'I'd say he's one of the best in the league, so I'm very surprised he hasn't seen it. If we get a penalty and score, it's 1-1 and we are still hunting Arsenal for third place.
'Now Arsenal have taken the three points and it's that bit harder for us.'