A blend of “tuff” (tough, cool) and “sussy” (suspicious or sus); used to describe someone or something that is both impressively bold and suspiciously sketchy at the same time.
A belt buckle that is so big it can do one of the following:
1) Keep a hernia in check.
2) Act as a girdle.
3) Block the view of your penis so nobody will know if you're walking around with a woody.
4) Be used as a dinner plate.
That Texas Truss is so big I bet it cuts into his legs when he sits.