Flab Giant

Massive Bulk. A flab giant can't take the Dash action. In addition, a creature attempting to grapple, push, or knock the giant prone has disadvantage on attack rolls and ability checks to do so.

Multiattack. The giant makes two Slam attacks. If both attacks hit a Medium or smaller creature, the target is grappled (escape DC 15).

Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) bludgeoning damage.

Squatting Pin. One creature grappled by the flab giant must make a DC 15 Strength saving throw. On a failure, a creature takes 22 (5d6 + 5) bludgeoning damage and is restrained until the grapple ends. On a success, a creature takes half the damage and isn't restrained, but it remains grappled until it escapes. While restrained, a creature takes 8 (1d6 + 5) bludgeoning damage at the start of each of the giant's turns. If the flab giant moves, the target is no longer restrained or grappled.