when you take the ball sacks skin and squeeze it together in your hand to make it wrinkly like a "walnut"

When a man sticks his finger up his ass-hole in order to tickle his prostate, causing an instant, extreme orgasm. The prostate (looking like a walnut) is commonly used as a sex toy for vietnamese people.

A walnut is someone who hasn't been cracked open to reality. Someone really innocent or naive.

Adjective.

Kind of like nuts, but way more nuts.

A person who likes to shop or hang out at Wal-Mart a lot.

Another name for John McCain.