Ha! I've seen some similar themes following teams in the lower leagues here.

Teams from the less industrialised north get a lot of abuse for their fondness of sheep. For coastal Peterhead, we use "You only sing when you're fishing".

Probably the funniest one was when we were playing against Stenhousemuir. They celebrate the clubs connections with Norway, and so they have a cowbell they like to ring all the time (you can still hear it since the attendance at these games is low). One time they were doing it a bit much and it resulted in a chorus of "Shove yer cowbell, Shove yer cowbell, Shoooove yer cowbell up yer arse"...