The act of reposting on instagram. It involves screen-shotting someones else's original post, and then reposting it using the hashtag #regram and acknowledging the source of the original instagram posting.
So called 'illegal' posts are those that are 'regrammed' without acknowledgement of the original creator or w/o using the #regram hashtag
Our 22 year old intern just taught me how to 'regram' - and now I feel like a useless technophobe, i guess it kind of the same way i made my parents feel about their inane questions on how to work email.
"Thanks for finally providing me with the copy, but since it's four times longer than you told me to expect it to be, I have to rerag the entire document to fit it. But yea, great, thanks."