Using it on other servers or in DMs needs Discord Nitro.
To add it to a server you manage, download the PNG, then open Server Settings → Emoji → Upload Emoji. Discord takes PNG, JPG and GIF files up to 256 KB.
Also known as
P_pepeBored, 1_2MISC5pepe_depressed, pepe_depressed, sad, TH_peepodead, pepe_sedlaif, QTpepesad