I call "doing the splits" doing a split and the "side splits" a straddle (terms we used at my dance school). I've never been able to do a straddle, even when I was dancing when I was younger, but I could do a left split and right split. I haven't done one in years though...probably not since high school (and when I did it, it was the first time in a long time and I basically forced it and hurt myself lol). That's what I get for trying to show off.