Iliotibial Band Friction

a common diagnosis given by a trained medical professional when there is nothing wrong with his patient
patient: "Yo doc, my knee hurts like whoa"
doctor:"Hmm...looks like Iliotibial Band Friction. Have a lollipop."
by The Knee Doctor May 25, 2011
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Hand Dick Friction

1) The force applied to one's penis during masturbation or hand job. Levels of "HDF" can become increasingly uncomfortable without the use of proper lubrication.

2) The act of male masturbation
God Damn it John!!! It smells like Hand Dick Friction in here!
by kilo2824 July 01, 2011
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Ball bag friction theory

One theory to explain the occurrence of a hole in the crotch of a mans jeans. Over time the material is eroded by the constant friction of the swinging ball bag.
Person 1: 'Dude, your nuts are hanging out of that hole in your jeans'.....

Person 2: 'Yeah sorry man, ball bag friction theory'
by Yippikiai June 09, 2013
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When a guy wants to talk to a girl but he doesn’t know what to say to her he asks her if she has ever run a friction crane. Nobody really knows what a friction crane is but it is a way to start a conversation.
Guy: Have you ever run a friction crane?
Girl: Whats that?
Guy: I don’t know but I thought you were pretty and I wanted to talk to you.
by Friction crane guy January 02, 2023
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double friction

After hammering my thumb I yelled out "DOUBLE FRICTION" to avoid cussing.
by Kristiana November 06, 2007
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Snack-friction

The act of shaking a snack eg. Popcorn or M&M's back and forth in your hand in the hopes it will taste better.
Wow, that popcorn is so much better when you add a little snack-friction!
by Ivbnhrb4 November 09, 2010
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science friction

When you're watching a science fiction anime and there appears to be sexual tension.
When I was watching Steins; Gate there was a lot of science friction.
by Agentw21 December 27, 2017
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