1. One who's social skills are evenly compared to those of an autistic savant. sans savant.
2. One who's athletic prowess and general coordination resemble a one-armed, one-legged man trying to compete in an "ass kicking while jump roping" contest.
'sift monkey' usually refers to one who constantly employs both of the above qualities throughout his day-to-day interactions. He appears like a monkey that is very inept in his ability to find gold while sifting through the river.
That sift monkey in high school who was caught in the locker room jacking off, while huffing the girl's gym teacher's granny panties.
When a man has HIV and hires a prostitute to have sex with him. He ejaculates in her throat giving her the virus. Then after having sex he pays the women and then gives her a one dollar bill with a note on it saying to go get tested because he has HIV. Usually the man is on the verge of AIDs.
Dude I fucked with this prostitute so bad last night.
Really Nice
Yah I gave her a Skunky Monkey
No way Yah
Ew, but nice