signal to noise ratio

the ratio of signal to noise in decibels (dB).

A postitive signal to noise ratio means the signal is louder than the noise. A negative signal to noise ratio means the noise is louder than the signal. Typically, the signal is speech, music, or whatever sound is being listened for.

by Jody August 28, 2003

signal 2

police jargon for an individual who is intoxicated

"Both of these suspects are Signal 2"

by freeski4ever September 18, 2006

signal for help

Hand gesture for domestic violence (or any kind if violence) SOS (or S.O.S) signal
Also known as 540 gesture and Violence at Home Signal for Help

This hand gesture intially used in Canada as an alert to notify any violence during CoVID-19 lockdown, but this hand gesture has been widely spread around the world

How to use Signal for Help/540 Gesture:
1. Make sure you or people around you are the violence victim (either physically, mentally/verbally, or sexually)
2. Record yourself doing this continuous hand gestures in order:
A. First, put your hands up with palms facing to camera (Hi-5)
B. And then, tuck your thumb while your palms facing to camera (Hi-4)
C. Next, fold your fingers down, symbolically trapping your thumb while your palms facing to the camera (fist up)
3. Share the detail of violence, including the name of perpetrator(s), but don't share the name of victim(s) unless it happens to you or you want to report it to the law enforcement through private message

by Sir. B March 17, 2021

signal boost

Spreading the word, or 'raising awareness' of an issue without actually doing anything useful (like, say, donating money). Popularly employed on Tumblr by image-conscious bloggers who want to look like they care deeply about a cause or issue, while they try to avoid investing any time, money or effort into said cause.

A Tumblr slacktivist reads a blog post from another Tumblr user who doesn't have enough money to pay rent and is shamelessly groveling for money on the internet.

Tumblr blogger: "Reblogging this is as good as giving money, right? I'll just tag it 'signal boost' so everyone knows how much I care about raising awareness and helping others."

by We Fought a Zoo October 3, 2012

signal to noise ratio

The ratio of what a woman says that makes sense to what she says that makes no sense.

This ratio is generally never greater than 0.5.

Man: I think my wife was trying to tell me something, but her signal to noise ratio was too low.

by Tim McFadden August 28, 2003

signal 4

Law Enforcement code for a Car Crash

That pursuit out on route twelve just signal 4'ed. Better send the meat wagon.

by jc.black May 8, 2007

Signal Song

The prearranged song you play when you are about to get busy.

I heard that old Mark Chesnutt signal song playing downstairs, and I knew he was getting ready to bang the hag.

by jimsnow0 November 19, 2012