used for texting/online chat "er" is an abbreviation for "eyeroll"; when someone does or says something that makes you roll your eyes you "er" at them; it can also be used in place of the term "oh, whatever"
"she said what?" er
"whatever" er
"that guy was so sexy.. "
"the bald guy, gross?"
"er"
er is a word used by jocks in Dublin to basicly piss off somybody they dont like or to burn them.also the term er mates is used to say, "you have no friends"