" slacking (off) "

 [ "slack off" ]

1: to waste time

  * e.g.,  ... Slacking off at this time, when there's so much to do? (to slack off) 

 [ "slacking off" ]

1:  Not doing very much of anything. Not doing what you are meant to be doing.

  * e.g.,  ... Stop slacking off Steve 

 [ "slacking-off" ]

1: The act of one giving themselves an over-the-pants handie, whereas they are either unable or too lazy to pull their pants down and masturbate correctly.

  * e.g.,  ... "This morning at work John was totally caught slacking-off under his desk." "I always slack-off at dinner on the first date." 

 [ "slack off" ]

1: To masturbate, jack off, stroke your penis, fap, beat your wiener, play with yourself,

  * e.g.,  ... My penis was a boner so I slacked off. 

 [ "slacking off school" ]

1: When you have a computer and unblocked games are working 😈 😈 😈 😈

  * e.g.,  ... Are you "slacking off school"?