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1.
To pull over and masturbate when driving long distances. Much like the advised "power nap" to avoid accidents.
"Man, ive got one hell of a boner, better pull over and power wank."

http://www.youtube.com/watch?v=6hTWzmxSJQ8
by Baxt August 27, 2008
122 44
 
2.
To 'beat the meat' within seconds of ejaculation, then stopping. Enjoy the feeling for a while. Wait for the feeling to stop, then beat until you are within seconds of blowing again. Repeat for a good few hours, then while you do finally blow your load, it will feel a million times better than any wank, blowjob, fuck or sheep shagging.

Well recommended.
*ring ring*

Man 1: Hello?

Man 2: Alright dude?

Man 1: Fuck off, I'm having a wank.

Man 2: Fair play, I'll call you back in 5 then?

Man 1: No. I'm having a power wank...

Man 2: A who wank?

Man 1: *sigh* Just call me back in 3 hours.

Man 2: 3 HOURS?!

*Dial Tone*
by Looney... February 13, 2010
62 21
 
3.
To stand in front of a full size mirror, only wearing a viking helmet and 'wank' solidly for 10 minutes while listening to 'The Ride Of The Valkyries' (the one from Apocalypse Now)
Person A - "I had an awsome power wank last night"
Person B - "Wierdo"
by Jonnie66 August 16, 2006
114 75
 
4.
The act of commiting 'self abuse' over a number of hours. Possibly whilst watching an arty French flick on a lonsome Friday night while futily tugging on ones flacid penis for three hours waiting for the leading lady to get her little bra-less French tits out.
"Fuck me, the wee man's in tatters! I had a three hour Powerwank last night."
"Over that French flick?"
"Aye"
"T'was shite, she never got her tits out."
by Rory 'Sunday' Bulloch November 10, 2005
29 9
 
5.
In the case of extreme horniness and unable to find the proper equipment (magazines,internet,movies etc)and you are in a public place (school,work etc). A power-wank is the answer. Max time 30 seconds. You go into that loo and bash at your member so hard your hand almost falls off.

Can be used in competition: who can wank the quickest. Wud only advise if reali drunk or you dont mind group masturbation
"Joe you were quick in the loo?"
"oh thx just went for a power-wank to clean the pipes"

"go"
"go"
"go"
"WHEY"
by Billy Sastard August 12, 2007
23 12
 
6.
The act of wanking to ultimate pleasure. This is done by assembling 3 computer screens side by side, putting porn on all 3 of them and then blasting your stereo with dubstep so you can't hear anything else. Proceed.
Jesse was feeling a little depressed with life so he busted out a power wank to lift his spirits.
by colourize June 29, 2011
45 35
 
7.
The act of masturbating whilst inserting something into one's own anus, typically a finger or toothbrush. Known to "power up" a good wank.
1)I had an awesome power wank last night.

2)Q: What's Ed doing?
A: He's powering it up in his room.
by poweritup108 October 13, 2005
67 59