I have read one of the abbreviations on Wikihow related to the SMT. And it might be the correct meaning of this slang. The full form I read there is "Send me this". You can also check the whole content regarding the SMT and more related to this slang there. There are many slangs but make sure to use all these abbreviations wisely.
On Instagram, SMT can mean "Send Me This", often used in comments to request a post or link. It can also stand for "Social Media Team" in a business context.
On Instagram, SMT typically means "Send Me This", used when someone wants a post or link shared with them. It can also stand for "Social Media Team" in business contexts.
