When you want to say "I'm not buying it" without words, insincere expression emojis deliver. Use 😬😇 in awkward apologies, or go for 🙃😸😏 when you're teasing but not quite honest. The trio 😜😇🙄 nails that fake enthusiasm, while 🤥😏😈 adds a mischievous twist. Great for text conversations where your sarcasm needs a little visual backup or subtle eye-rolls in group chats.