The Cherries had taken the lead against Spurs through Matt Ritchie, only to ship five goals as Harry Kane bagged a hat-trick for the visitor.
Goalkeeper Artur Boruc was at fault for at least three of the Tottenham goals as Mauricio Pochettino's side dominated the second half to wrap up a 5-1 win.
Towards the end of the game, the PA microphone appeared to be accidentally switched on and the whole ground heard a conversation between two men.
In summing up their views on the game, one claimed 'it's f****** unbelievable, men against boys' - to the amusement of most of the crowd.
Both sets of supporters sang 'You're getting sacked in the morning' and, after the match, a Bournemouth spokesman confirmed to Press Association Sport that the incident will be investigated.
Eddie Howe was asked about the situation in his post-match media duties but claimed he could not discern what was being discussed.
"I just heard noise, I didn't really hear any words said," he said.
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