BESSS- from the original word BEST .More "s" added means the more exceptional, or best thing ever.
Trinidad originated and made popular by the younger generation to describe situations, places people and at large anything that calls for an exclamation of wondrous delight so much so that the T is left out.
Could also be used for agreement of a previous statement without having to go into detail but firm conviction.
That party was besssss !!
Whey that girl bess !
That taste bessssssss
The beach was bess today