surfer's knob
English
Noun
surfer
's
knob
(
countable and uncountable
,
plural
surfer's knobs
)
(
surfing
,
slang
)
A hard
bump
or
nodule
on a
surfer
's
knee
,
shin
or
ankle
, resulting from recurrent
contact
with the
surfboard
.
Synonym:
surfer's knot