A female individual who is sick in all the best ways. With an educated sense of style and an open philosophical mind, a SickGurl is not afraid to express herself at all. She is Sick of worldly injustices like hunger and hate, and bad driving, and she will always be a Gurl who is not afraid to initiate change. SickGurls are athletic, disciplined, and sexy, and they use their powers always for good and not evil.
Look at the hot boots on that SickGurl, I heard she bought them on overstock.com and gave the money she saved to the Red Cross.
Endearing Glasgow slang used to describe one who's actions and outlook verge on insanity, especially if you are in awe of said person. A compound of the words sick(ill) and nut(head)
Did you see Gizzypan those windaes? He's a pure sicknut!