A great Australian one that doesn’t involve spiders or cunts is “tell ‘im he’s dreamin’”, usually said in a real broad accent (you can change the pronouns around what more matters is the way you say it). Usually used whenever someone’s asking too much money for something but can also be used for when someone’s asking for too much in general and basically means “are you fucking kidding me that’s way too expensive”. It’s from a great movie called The Castle. It also gave us the saying “[this is going] straight to the pool room” meaning “shit this is really nice thanks” (because the pool room is where you put your trophies and whatnot) but I think that’s a little less common.
On the other side of the globe, Norway uses “Texas” to mean “crazy weird shit”. There’s also “kamelåså” which generally means “unintelligible (like a Danish person)” which is from this great comedy sketch about Denmark that’s so good NRK decided they had to translate it into English just so people could make fun of Danish internationally (The untranslated bits are just danish sounding gibberish)
Wordpress even has activitypub integration now! Hooray! Here’s hoping automattic do good on their word and bring it to their other projects like Tumblr
Also as much as I like gimp, it is unfortunately not that widely used due to super specialised and hard to use compared to the industry standard juggernaut that is adobe’s creative suite. You’re probably going to get laughed at in any professional industry if you suggest seriously using it.