Megson's Trotters had won three home games on the bounce going into the clash against the Cottagers, but were brought crashing down to earth as Roy Hodgson's men earned their first away win of the season.
Bolton stay 11th, but lie nervously just four points above the relegation zone and Megson revealed that the disappointment of defeat provoked a spat between players and fans alike.
And The Trotters' tactician admitted his side must play ugly if they want to stay in the Premier League for the ninth successive season.
Spat"We've been beaten 3-1 and there's been a reaction to individual players from the crowd - some of the players have reacted to as well we'll have to try and sort out," Megson confirmed.
"We're going to have to find a way to get over the finishing line. I don't think we are going to play Brazilian-type, attractive football.
"We're going to have to roll our sleeves up as I said, play at a high tempo, get the second balls, get crosses in and do the things we do.
"Today we've huffed and puffed a little bit, but the mistakes we've made have cost us and you're not going to win many games at this level."