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Acronym for Strokes Per Minute, a measurement for the speed at which one strokes the penis during masturbation. The average SPM for males aged 13-31 is 55 usually decreasing as the masturbator approaches middle age. A session with an SPM of 70 or higher usually lands the masturbator in either the emergency room or the burn ward.
Example 1

Guy A: Dude did you hear about Dillan, his SPM hit 90 last night!

Guy B: No way man! Is he ok?

Guy A: *Starts sobbing* Dude, they couldn't save it.

Example 2

"I imagined myself having slow, passionate sex with Rachel last night so my SPM never went past 40"

Example 3

"I only had 2 minutes to squeeze one off before the bus left so my SPM hit about 65"
SPM by bem809FR23 April 19, 2010
Spanish acronym for su puta madre which roughly translates to son of a bitch.
Juan: Hey Carlos, how did the test go?
Carlos: I failed the test, SPM.
SPM by The Surge December 30, 2009
spm is short for south park mexican. his real name is carlos coy. he is convicted of aggravated sexual assault of a minor. (who was nine at the time) he is a piece of shit that deserves to be raped in prison. seriously a nine year old? fuck him and his supporters. carlos coy and anybody who puts food on his piece of shit chomo plate should be beat. fuck spm.
In 2002, Coy (spm) was convicted of aggravated sexual assault of a child and sentenced to 45 years incarceration, and is currently serving his sentence at Powledge.
spm by 805scott805 August 17, 2010
The moment during a conversation in which someone uses a smart phone to look up a fact or tidbit of information that pertains to the conversation.
person 1: "Who directed Dazed & Confused?"
person 2: Um wasn't it was that guy that made Slacker?
person 3: Yeah that sounds right, he's from Austin I think?
person 4: (takes out smart phone) Hold on, let me check...
persons 1,2 & 3: (in unison) SPM!
person 4: (brief pause) "It's Richard Linklater. Lets see... he was born in Houston & moved to Austin to become a film maker. It says here that 'he made Slacker for only $23,000. The film is an aimless day in the life of the city of Austin.' Hey, did you know Ben Affleck is in this movie?

person 1: SPM dude!
person 4: SPM, what's that?
person 1: urban dictionary bro, look it up.
person 4: (takes out smart phone) Lets see here...
persons 1, 2 & 3: (in unison) SPM!
Nerd bro 1: dude I was talking to Julia last night and asked her to spm
Nerd bro 2: oh wow what did she do??
Nerd bro 1: she asked me if I've ever heard the tale of Darth Plagueis the wise