Hey Mike!!! I just tried to throw out this box; the dipsty dumpster in Crawford Place is full, so I'm going to try the one in the alley behind the apartments on Olive Way next.
The act of inserting an erect penis into a menstruating girl's vagina to check for blood similarly as one would check for oil in an automobile. It is also a good way to measure the depth of a woman's vagina. If a large enough man measures his own length prior to dipsticking, the amount of "oil" on his penis post-dipsticking will determine her depth.
Remember that during dipsticking it is important to wipe the dipstick off before you check for oil to yield sufficient results. It's got to be clean, and you have to give it a good swab."
-The latter, has in fact been attempted with satisfactory results.
A sexual/alcohol-related act akin to the infamous buttchug. When performing a Mexican Dipstick, one party will soak their finger in tequila, and gently insert it into the anus of the other party.
A knife. Termed "Mexican Dipstick" due to the amount of Mexicans (mainly those in gangs) who typically wield knives.
Primary function is to determine if the person it is tested on (victim) is low on oil (blood). A play on the "real" dipstick, used to measure oil.
So I was walking to the 7-11 and some guy was like "Tennis Rules!" so I responded with "Tennis is for bitches!". He proceded to pull out his mexican dipstick and chase me for 2 blocks before he gave up.