The present participle of quoaf, which is itself an alternate spelling of quofe.
noun: Penile flatulence (air or gas escaping from the penis through the urethra), a.k.a. a dick fart.
verb: To emit penile flatulence.
ETYMOLOGY: "Quofe" is the male form of queef.
NOTE: Quofes are a rare phenomenon compared to queefs because it is much harder for air to become stuck in a man's urethra than in a woman's comparatively larger vagina. Quofes occur most frequently after a catheter has been inserted into the penis and removed, leaving air trapped in the bladder or urethra.
After Reginald's catheter was removed, he tried to take a piss, but ended up quoafing and splattering urine everywhere.