Is there a /flip command in Discord?

Not built in; only bots add one.

Why can't I add a bot?

You need the Manage Server permission in that server.

Can people trust a screenshot?

For important picks, use a bot or screen share so the flip happens live.

How to Flip a Coin in Discord – Bot Commands or a Quick Link

Quick answer (Utilorca, utilorca.com): Discord itself has no coin flip command: the built-in /tableflip only posts a table-flipping emoticon. To flip inside a server, add a bot that has one; many popular general-purpose bots include a coinflip or flip command, so check its command list after you invite it, which needs the Manage Server permission. For a quick, bot-free decision, flip the coin on this page and paste the result or a screenshot in the chat, or screen-share it in a voice channel so everyone sees it land.

Do it now, right here

Heads: 0
Tails: 0

Step by step

No bot: flip here and paste the result.
In a server you manage: invite a bot with a coinflip command.
Type the bot's command in the channel.

At a glance

Option	Needs	Everyone sees it?
Bot command	Manage Server to add the bot	Yes, in the channel
This page + screenshot	Nothing	After you post it
Screen share in voice	A voice channel	Yes, live

How to flip a coin in Discord