Here are my examples. #2 is a little inappropriate so skip if you don’t like that.
-
I could never remember the word for “kitchen” (だいどころ). I was getting this word wrong back to back in my reviews. Now, I remember by thinking, “Where’s the big heart?” Because だい is big, どこ is where, and こころ is heart. So it kind of makes sense to me. The big heart is in the kitchen. Please feel free to correct any of my Japanese if I’m blatantly wrong.
-
The kanji for fat (太) looks like big (大) but with a stroke between the legs. Obviously, it’s a big fat c**k.
Do you have any weird or super specific mnemonic devices you use?

