When you get so tense that you just can't take it anymore and you start screaming a wild war cry whilst lifting your shirt over your head demonstrating your breasts to thine enemies
Shelbie was so sick of being harangued by everyone at camp, that when I asked her how her day was she gave me a frustration flash
Someone who is willing to perform sexual favors in return for alcohol. The person in question is generally underage and therefore can't purchase the substance themselves.
Lindsay was such a gin slut, she made out with an old guy for booze.