Acronym for Mount Taint
Bike, which is old slang for a Mountain Bike. Riding a bicycle
on rough terrain causes repeated
trauma between the rider's legs; in male cycling
enthusiasts, this often leads to irritation and swelling of the prostate
. This would result in a characteristically swollen perineum
(a "mount taint
"), the external
manifestation of both local
trauma and the enlarged
With the increased popularity
of padded bicycling shorts, the "mount taint" phenomenon has decreased
in frequency (though by no means disappeared), and many
cyclists nowadays are unaware of the origin of the term MTB, believing instead in a folk etymology that describes it as a nonsensical acronym of *"mountain bike" ("MounTain Bike"?).
Albert: Hey Bob, what's up? You don't look so good!
Bob: No kidding! I had to see my proctologist
last week... now I get why they
are called MTBs!