A used condom replete with fluids, typically found on the ground in outdoor "parking" areas frequented by couples.
We were strolling in the park down by the lake, and right there on the ground were many packets of lakeshore mustard glistening in the moonlight that we managed to side-step.
When a man with a STI or yeast infection has yellowish cum that taste funnier than regular cum
“I hung out with this guy last night and now I think i have an infection from his funny mustard”
When your shit is burning hot and running and it's almost an orangish-brown type color
"Bro, hand me the toilet paper. I had Taco Bell today so I'm spewing hot mustard all over the fuckin' toilet.
When you're about to nut so you lift up your hoe's wig and cum on her bald cap and put her wig back on.
I just gave this dirty hoe a crab mustard.
Bum mustard is the creamy result of having someone ejaculate during anal sex. It is yellow in colour and has a thick creamy consistency.
I came and when I pulled out there was bum mustard all over!
When a foot fungus goes unchecked and starts secreting a strange yellow substance. That substance is called foot mustard.
Dude, get a doctor to check out your foot mustard situation, it's seriously gross.
Homeboy spanking it got his pud mustard all over the toilet seat.