As the description suggests, it generally refers to male masturbation.
I spent half the day, at work, in a cubicle in the toilets; fantasizing about rough sex with my boss, while having one off the wrist. Eventually I had to move to another cubicle when the toilet roll ran out.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.
After school, The Modells on Jamaica Ave was active. Respectfully.