In poker, “bottom end” refers to the lowest possible made hand in a particular category. For example, in a high-only game like Texas Hold’em, the bottom end of a made straight would be the lowest possible straight. Similarly, in a low-only game like Omaha Hi-Lo, the bottom end of a low hand would be the hand with the lowest five cards that all have ranks of eight or lower. “Bottom end” is usually used in the context of discussing the strength of a particular hand, with “top end” referring to the highest possible hand in a given category.