also: せんくす
Casual, colloquial interjection borrowed from English. Used in informal situations among friends or in pop culture contexts.
サンクス、助かったよ。
Thanks, you really helped me out.
プレゼントありがとう。サンクス！
Thank you for the present. Thanks!
ありがとう is the standard, neutral way to say thanks in Japanese, while サンクス is a casual English-derived loanword used only in informal, playful contexts.
Borrowed from English 'thanks'.