inkblot
A poorly applied or ugly tattoo.
She's hot, despite the inkblot.
Inkblotting
To interpret an ambiguous situation in a way clearly driven by one's own beliefs, with a completely unjustified level of confidence. (Based on the inkblot test, also know as the Rorschach Test, in which an ambiguous ink blot is described by a patient, which aims to reveal content in the patient's subconscious that is nowhere in the actual picture shown to them.)
She declined a second date after the first one didn't go well - you were late, the restaurant wasn't so good, and you didn't really "click" - and you're 100% sure it's because you're overweight? Dude, you're inkblotting.
Donkey inkblot
When you stick a pen in your partner's asshole and then punch it. Immediately after fuck their asshole until the pen starts to leak profusely.
Jim: Man, I haven't washed even after last nights donkey inkblot
Joe: Dude that ink will stain your junk
Joe: Dude that ink will stain your junk