Rick was actually using the primary definition of Twink:
An attractive, boyish-looking, young gay man. The stereotypical twink is 18-22, slender with little or no body hair, often blonde, dresses in club wear even at 10:00 AM, and is not particularly intelligent. A twink is the gay answer to the blonde bimbo cheerleader. There are two major theories about the origin of this word, both of which probably have elements of truth to them. a) Twink comes from an acronym T.W.I.N.K. "Teenage, White, Into No Kink." b) Twink is a shortening of the name for the famous "TWINKIE" snack cake: a tasty, cream-filled snack with no nutritional value. The phallic shape of the "TWINKIE" snack cake should not escape the reader's attention.
I don't like going to that club because it's nothing but a bunch of twinks.
You're thinking of the secondary definition:
In an MMORPG, a veteran player who makes a new character and gives a bunch of top-shelf equipment from their older, maxed-out characters to the new character.
Hey, someone is hunting fire beetles in full rubicite armor. He must be a twink.