Typically, certain varieties of apples and first crop grapes, and other fruits, are so sour they will make a person squint.
Ben made an apple pie using some squinters.
Those plums are so sour they are squinters.
They have a long commute in the shitty Parramatta Rd/M4 peak hour traffic, and have to squint in the rising sun in the morning and/or setting sun in the evening.
Scott: "That’s because it takes the dickheads nearly 2 hours to drive home!"
2. If that damn squinter doesn't stop playing with his remote control cars, and start doing some work.....