Tucking the tops of your ears under the bottom edge of your baseball cap. Associated with being either a drug dealer, user or general scumbag. Usually accompanied by a bum bag, Nike TNs and a cigarette.
I knew he was going to be a piece of shit as soon as I saw his 'Cronulla tuck'.
Taking a shit and freeze it. Once frozen slide into a condom, tie the end off and then fuck your sexual partner with it.
This chick i met the other night was so kinky, she even let me smudgy her.