Hammers fans are excited for next season after the club shipped out a number of flops and recruited top quality players in the shape of Pablo Zabaleta, Joe Hart, Marko Arnautovic and Javier Hernandez.
The signing of proven goalscorer Hernandez has captured the imagination of not only West Ham fans but also rival supporters who have voted it the best piece of business so far this summer at the relative bargain price of £16m.
But it appears one Hammers fan got a bit too carried away by the prospect of Chicharito's arrival before he signed.
A Hammers fan going by the Twitter name Tappa was so excited - and somewhat dubious - over the club's chances of luring the former Manchester United and Real Madrid striker to the club he pledged to have a tattoo of the Mexican flag on his buttocks if they did.
Back on July 11th Tappa posted on Twitter to Hammers co-owner David Gold: "If we sign Hernandez I'll get the Mexico flag tattooed on my arse. I've seen how these tweets go, but if it helps us sign a player then (all good)."
So when West Ham completed the signing of Mexico's all-time leading goalscorer reality hit home and Dave Sullivan, the son of co-owner David, offered to pay for the tattoo if the supporter went through with it.
And Tappa did just that, taking to Twitter this week to reveal the rather sore looking finished tattoo with a thank you message for Sullivan junior.
"Well this just happened... Hi Chicharito welcome to West Ham United massive thanks to Dave Sullivan for fronting the money," Tappa said.