like a nail in the head 

An analogy for obvious. This was originally coined by a pharmacy professor at the UT Health Science Center at San Antonio. The professor was referring to Phineas Gage, a 19th century railroad worker, who suffered a freak accident when an explosion catapulted a large piece of iron through his skull and into his frontal lobes. An injury that was anything but subtle.

Professor: "what's an antibiotic used for?"

Student Bob: "Uh, there is an inhibitory, Uh, upregulation and, Uh half life ..."

Professor: "An antibiotic kills bacteria. Bob, the answer was like a nail in the head and somehow you completely missed it"

like a nail in the head by MeDavebo October 7, 2008

Nail bomb 

Act of having diarrhea so badly that the entire inside of the toilet is spray painted with excrement.

Art runs screaming from the bathroom, cursing at Evan.

Evan: Dude, calm down, what's your issue?

Art: DUDE, if you're gonna' have a nail bomb in my toilet, at least give a second flush! My cleaning lady doesn't come until Friday!

Nail bomb by g-othermal November 2, 2009

Nail Polish 

Mutli colored fluid from Hell! Nail Polish comes in a wide array or colors and costs. It's also close to impossible for a normal female human to consistently apply with anything close to acceptable results. It is placed in stores globally so as to infuriate women equally

out of pure boredom i did my nails...and you can see that this nail polish was not where close to even looking like any one under the age of 6 had put it on..what the heck??

Nail Polish by DaynaS February 28, 2008

Nailgun 

“It’s loud, it’s powerful, it’s fuckin’ BOOM- like you know what I mean- it’s like- it’s like- you- like the whole neighborhood shakes when you hear a nailgun. That’s a fuckin’ nailgun. That’s why I’m the nailgun. Ahah! Its- that’s it! But I’m not like one of the nail guns you plug into the wall you get from like, Home Depot, I’m one you plug into a fuckin’ compressor- and you fuckin- and you just- BOOM BOOM- like, y’know what I mean!? Like, that’s a nailgun.”

Couple of local nailguns getting at it today

Nailgun by HarverdIsCalling March 9, 2023

Rail Nail 

To have sex on a train. The equivalent of the mile high club, but for trains.

I got a rail nail on amtrak last week.

Rail Nail by Arrellaga September 7, 2009

e nail 

An electronic device used to control the temperature of a titanium (or quartz, etc) dish, used in place of a bowl on a glass on glass water pipe, used to consume medicinal concentrates/extracts.

Your dude: Hey man, have you checked out those sweet new e nails over at Bridge City Dabs?
You: Yeah brotha, they're sick as f*ck! In fact, it's the only way I'll dab!

e nail by portlandoregon October 25, 2016

coke nail 

A term used to refer a long pinky nail for coke addicts sniffing coke

Damn it my coke nail broke!

coke nail by DizzyLizzy February 10, 2007