The limb of a creature
part, member, lower appendage, hind leg, foreleg, back leg, front leg, left leg, right leg, shank, shank's mare*, underpinning*, gam*, stem*, pin*, bender*, landing gear*; see also limb 2.
A relatively long, narrow support
post, column, stake; see brace 1, support 2.
get up on one's hind legs*
assert oneself, be aggressive, take a stand; see declare 1.
give a leg up*
not have a leg to stand on*
be illogical, be unreasonable, make rash statements, have no defense, have no excuse, have no justification; see also mistake.
on one's last legs*
pull someone's leg*
shake a leg*
stretch one's legs*
take to one's legs*