Spaff 

spaffing. the action of overshooting when accelerating and never reaching the target.
descriptive term applied in particular to boid movements.

boid1 wants to get to boid2. with each step it takes towards boid2, the steps get larger, so it will eventually go past boid2, whereupon each step will get smaller until the steps become negative and boid1 reverses direction and moves towards boid2 again, it step it takes getting larger, and so forth. boid1 will continue spaffing around boid2 forever. incidentaly, the 'shape' of its movement is a sin wave.

Spaff by barn March 7, 2005

Spaff 

Girls love juice, guys spunk, girls spaff....

Upon seeing a fit man/woman "I just spaffed in my pants"

"They are totally spaffing!"

Spaff by Nocturnal Eccentric December 30, 2009

Spaff 

To jizz in ur eye by accident.

i spaffed last night.

Spaff by lolololololoololl November 24, 2016

spaff 

stuff you can't bring yourself to throw away -possessions with no discernible value other than to the owner

used in rave/squatting culture since mid 90's

got to sort out the spaff mountain - there must be stuff the charity shop would want and we can recycle the rest

spaff by richard November 9, 2004

spaff 

To cockslap, as it were.

One with an enormously large penis could potentially spaff a city, sending skyscrapers tumbling (imagine if the planes that flew into the World Trade Center were a giant penis--that would be a a city-spaffing.)

Also:

He finished rocking the crib with a swift spaff of the baby.

spaff by Nate March 10, 2005

spaff 

to slap your dick on a womans face (the other definitions are wrong)

I spaffed your mother last night. She received a good spaffing.

spaff by o_O~ April 21, 2004

Spaff 

Wasting cash

When you go to the pub and spaff all your dollar

Spaff by Sphaff June 17, 2017