trail one off

to get up from one's chair and walk around with the express purpose of letting a fart rip. This has a few benefits; (1) the smell cannot be easily attributed to the emitter (2) the smell will distribute across a wider area, and dissipate more quickly (3) one's own work area will not become a miasma of the stench of one's own arse (4) it could even be coupled with a quick trip to The Gent's for a hasty kiss from Neptune herself.

I had Jalapeño's in my sandwiches for lunch; time to trail one off before the fog gets too thick

Batch one off

To masturbate and “batch one off” a selfless act for a friend who does not have gel for their hair prior to going out.

Oh my God we’re almost at the club and my hair is a disaster, can you please batch one off for me?