pig
bleed like a (stuck) pig bleed copiously.
bring (or drive) your pigs to market succeed in realizing your potential.
in a pig's eye expressing scornful disbelief at a statement. informal, chiefly North American
1987Evelyn E. SmithMiss Melville Returns Under other circumstances I think we could have been friends. 'In a pig's eye,' Susan thought.
make a pig of yourself overeat. informal
2004The Food Whore They were so simple but so good. I couldn't help but make a pig of myself and eat them by the handful.
make a pig's ear of bungle; make a mess of. British informal
☞ This probably developed with humorous reference to the phrase make a silk purse out of a sow's ear (seesilk).
on the pig's back living a life of ease and luxury; in a very fortunate situation. Irish informal
pig (or piggy) in the middle a person who is placed in an awkward situation between two others. chiefly British
☞ This expression comes from the name of a game in which two people attempt to throw a ball to each other without a third person in the middle catching it.
a pig in a poke something that is bought or accepted without knowing its value or seeing it first.
☞ In this expression, a poke is a small sack or bag, a sense which is now found chiefly in Scottish use.
2012The Age (Melbourne) Is that what we will get with Abbott? No one knows; yet it seems Australians are preparing to buy a pig in a poke if and when they get offered the chance.
pigs might (or can) fly used ironically to express disbelief. chiefly British
☞ Pigs fly in the air with their tails forward was a proverbial saying in the 17th century; the current version dates back to the late 19th century, and the first recorded use is by Lewis Carroll.
1973Jack HigginsA Prayer for the Dying 'Something could come out of that line of enquiry.' 'I know…Pigs might also fly.'
squeal (or yell) like a stuck pig squeal or yell loudly and shrilly.
☞ A stuck pig is one that is being butchered by having its throat cut; compare with bleed like a stuck pig above.
sweat like a pig sweat profusely. informal