ADJ.; An expression used to describe something/someplace/anything that is really cool or awesome. An expression used to describe something that you find cool, amazing, exciting, etc.
"Oh my gosh! That party was so sicky-tight!"
"Dude, I just got these new shoes, they're so sicky-tight!"
"I just got into Harvard!!"
"SICKY-TIGHT BRO!!!!, RIGHT ON!!"