Is this a stutter?

Is this a stutter? Sometimes I leave out words when I'm speaking. If I really concentrate I can prevent this from happening but it takes a lot of focus. I'd say my drop rate is probably 1% of the time and seems to happen more when I'm excited and relaxed. Example: "That's (going to be) sick if you do that," where I drop going to be and sometimes I'm unaware that I'm doing it. Is this a stutter? I've had this for years