A test to be preformed on a chick before eating her out. Finger her a bit and catch a whiff of your finger and you'll know if its safe to proceed.
Use your finger like a dipstick to check her oil
Yo man i checked her oil and knew it was safe
or
Yo man i checked her oil and DAMN!!! Was that a stank pussy.
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An offered postponement of sexual intercourse, due to untimely menstruation.
Mary Jane's offer of a red rain check gave Peter blue balls.
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When a same sex couple (normally women) are booking a hotel for a weekend liason, a lemon check is the moment of the phone call where they check with the hotel that they are okay with practicing lesbians frequenting their establishment.
When booking a hotel for a lesbian liason please remember to use the "lemon check".
Janine - Can I please book a romantic room for two for two nights please?
Hotel - Yes that's fine.
Janine - Do you mind that we are both women?
Hotel - Are you both attracive or butch?
Janine - ....hangs up...
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To have sexual intercourse.
Come on girl. Quit playing and let me check the merchandise.
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Checking on someone's past work experience
All we need to do is a backround check on you, if it goes well, you will be offered the job.
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when some slut walks up to you and says "vibe check" and whams the back of your neck supposedly checking your vibes.
Mark: Hey James, vibe check!
James: huh?
Mark: deliberately slams James on neck
James: Dude wtf? *breaks Mark's nose*
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