1. full of excitement, activity, or energy
there's a great buzz about the place
The verb to buzz means to make a low humming sound which is continuous or to move quickly and with lots of excitement or activity. The word 'buzz' is onomatopoeic meaning it sounds like the sound it describes. In a colloquial context to buzz or to be buzzing means to be very stimulated or to experience euphoria similar to being on drugs or very drunk. As and now her a buzz can refer to the sound of humming or activity made by bees or another group of insects or the sound of something electrical such as a television or a bell or buzzer. A buzz can also refer informally to a telephone call, so you can say 'I'll give you a buzz on the phone later', for example. A buzz can also mean a thrill or a sense of excitement or refer to a rumour.
2. call on the telephone
I'll give you a buzz tomorrow
A buzz can refer informally to a telephone call, so you can say 'I'll give you a buzz on the phone later', for example.