Embarrassed. If a Whipperslapper is slapped as an attack it yelps, becomes embarrassed and runs away from the attacker until the end of it's next turn. They will likely turtle and cry after being embarrassed.

Jolly. Whipperslappers always use a free action to laugh at anyone who gets slapped. They are unaffected by magical laughing means, such as Tasha's Hideous Laughter.

Tail Slap. Melee Weapon Attack: +3 to hit, reach 10 ft., Hit: 5 (1d8 + 2) [bludgeon] damage. All other creatures (who are not Whipperslappers) within 20' of the affected target must make a charisma saving through or use their reaction to laugh at the target. 

Turtle. A whippersnapper may huddle-up, getting on their knees and covering their head with their tail-hand. This grants +2 AC until their next turn. 

Vicious Yo Mama. Range 60 ft. Single Target. Target must succeed at a DC 13 Charisma save or they see and hear a very cruel yo mama insult as though it were coming from the nearest creature to the target. This is both a visual and auditory illusion, sounds like the voice of the nearby creature, and the target sees the creature turn to face them directly. The insult will be in the target's native language, even if the creature does not speak it.