Maupay fired the Bees ahead just 15 minutes into their Premier League clash away at Tottenham on Wednesday night.
The 27-year-old cheekily celebrated by doing Maddison's famous dart throw in front of the Tottenham fans, with Toney following in on the act.
Maddison is a massive darts fan and has been doing the celebration since his days at Leicester.
Their celebration led to an awkward exchange involving Maupay and Maddison - with the latter clearly not impressed.
Neal Maupay and Ivan Toney mocked James Maddison by copying his celebration after opening the scoring
Maupay turned to Maddison's darts throw celebration on the latter's return to the starting line-up
Maddison patted Maupay on the back of the head, before the Brentford man more forcefully tapped the England star on the chest.
The Tottenham playmaker had his hand on the back of Maupay's neck as the pair exchanged words before the Brentford star walked off with a smirk on his face.
Fans were quick to comment on the celebration on social media, calling the Brentford forward a 'troll'.
One wrote: 'Maupay is such a troll omg. Not him doing the dart celly.'
An Arsenal fan saw the funny side as they commented: 'Not Maupay with the Maddison celebration in front of the Spurs fans.'
Maupay and Maddison had an awkward exchange after the Brentford star mocked the latter's celebration
Brennan Johnson got one back for his team-mate by doing the darts throw after putting Spurs 2-1 ahead
Dan King posted: 'Maupay doing James Maddison's dart celebration after scoring against us? I have a new mortal enemy.'
While Cal Watson commented: 'Maupay giving it the Maddison celebration on his first start back from his injury, and at the spurs stadium. What a boy.'
Tottenham would later get their revenge as Brennan Johnson did the same darts celebration after putting Tottenham 2-1 in front.
The clash with Brentford is Maddison's return to the starting fold after missing two months with an ankle injury.
Tottenham are hoping to jump Aston Villa into the top-four after Unai Emery's side lost 3-1 to Newcastle yesterday.
Maupay though gave Brentford the best start when Toney's shot was well saved by Guglielmo Vicario - but parried into the box where Maupay was lurking and the forward was able to make no mistake with his finish.
Destiny Udogie, Johnson and Richarlison put Spurs 3-1 ahead, before Toney pulled one back.
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