While chatting there are certain commands you can do to make your Growtopian perform an action.  They are:

• /? Lists available chat commands.
• /msg Usage: /msg <player> <message>; Sends a private message to the player specified.
• /time Shows the time in Growtopia.
• /r Replies to the last person who private messaged (/msg) you.
• /me Usage: /me<message>; Says a message with /me replaced by the player's username, and the message surrounded by angle-brackets.
• /status Lists your current world, number of backpack slots, and status effects.
• /broadcast
• Broadcasts a message to 1000 randomly selected players online. Costs 50 gems.
• /sb Costs 200 gems. Broadcasts a message to all players online.
• /stats Lists server uptime, number of players online by platform, active worlds, and server CPU load.
• /who Lists players in your current world.
• /uba Unbans all players who were previously banned. Only works in World-Locked worlds you own.
• /rules Opens the rules
• /news Shows the news
• /radio Toggles the radio, hiding public broadcasts when disabled.
• /mods Lists the usernames of the mods currently online.
• /pull <player>; For lock owners, pulls the indicated player to your position.
• /kick <player>; For lock owners, instantly kills and respawns the indicated player.
• /ban <player>; For players with World Lock access, bans the indicated player from entering the world for one hours.
• /smile The character smiles, showing their teeth.
• /cry The character cries.
• /laugh The character grins widely.
• /mad The character scowls, with their eyes turning red.
• /wave The character waves.
• /dance The character dances.
• /love The character's eyes turn to hearts and start spewing heart effects.
• /sleep The character's eyes close and emits Zs. If done by a bed, the character sleeps in the bed.
• /yes The character gives a thumbs up and nods their head while grinning.
• /no The character gives a thumbs down while shaking their head.