Definitions containing the term lubber's hole

What does lubber's hole mean?

BAH	Big Ass Hole Miscellaneous » Unclassified
BBH	Big Black Hole Academic & Science » Astronomy
BH	Black Hole Miscellaneous » Unclassified
BHB	Black Hole Bang Academic & Science » Astronomy
BHG	Black Hole Graphics Business » Firms
BHH(s)	Black Hole(s) Academic & Science » Astronomy
BH	Bore Hole Miscellaneous » Unclassified
BHA	Bottom Hole Assembly Business » Products
BHA	Bottom Hole Assembly Computing » Hardware
BHG	Bullet Hole Girl Governmental » Police
33B	Buzzards Bay Entrance Coast Guard Lifesaving Station/ Weather Observation Station, Woods Hole, Massachusetts Regional » Airport Codes
CHS	Collimated Hole Structure Governmental » NASA
DH	Dark Hole Miscellaneous » Unclassified
DTH	Down The Hole Community » Sports
EHP	Electron-Hole Pair Governmental » NASA
EHP	Electron-Hole Plasma Academic & Science » Electronics
FH	Fermi Hole Miscellaneous » Unclassified
FISH	Finger In Sinus Hole Miscellaneous » Funnies
FITH	Fire In The Hole Governmental » Military
FITH	Fire-In-The-Hole Governmental » NASA
FTMH	Full Thickness Macular Hole Medical » Physiology
GDIAH	Go Die In A Hole Internet » Chat
HH	Heavy Hole Academic & Science » Electronics
H	Hole Miscellaneous » Unclassified
HAD	Hole Accumulated Diode Computing » Hardware

lubber's hole(noun): hole in a platform on a mast through which a sailor can climb without going out on the shrouds